About site: Math/Recreations - Math Magic By Computer

About site: http://www.cut-the-knot.org/Curriculum/index.shtml#magic

Title: Math/Recreations - Math Magic By Computer Interactive java puzzles and activities in different mathematical topics.

Mathematical_Diversions Mostly original diversions in mathematics and word play.

Mathematical_Fiction A list of mathematical fictional movies, books, stories, plays and shows. Split into categories including children's books. Can be sorted by mathematical content and literary quality.

Mathematical_Induction A page of uncommon problems, most closely connected with number theory.

Mathematical_Lego_Sculptures Designed and built by Andrew Lipson. Images and LDraw files.

Mathematical_Problems_-_Problem_Solving Mathematics Hots (Problems) by Bruno Kevius

Mathematical_Quotation_Server Furman University Mathematical Quotation Server - random or searchable math quotes.

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Mathematical_Quotation_Server A collection of mathematical quotations culled from many sources. You may conduct a keyword search through the quotation database.

Mathematical_Spectrum Mathematical Spectrum is a magazine for students and teachers of mathematics in universities, colleges and schools worldwide. It may be read by anybody interested in mathematics as a recreation.

A__Mathematician\'s_Aesthetics In his classic A Mathematician's Apology, G. H. Hardy likened mathematics to poetry and painting. This site elaborates on Hardy's remark with quotations from Stevens, Klee, Fry, and Focillon. Links to

Mathematics_in_Art_and_Architecture An interdisciplinary course on mathematics in art and architecture.

Mathematics_Museum_(Japan) At Mathematics Museum (Japan) you would be surprised how interesting mathematics is. You will find exhibition rooms produced by Japanese researchers and educators.

Mathematik Individual pages on different topics in Mathematics. Examples : group theory, dynamical systems theory, geometry or number theory.

Mathematische_Basteleien Topics include Flexagon, Soma Cube, Pentominos, Cube-it, Rubik's Cube, Froebel's Star, Tangram, House of Santa Claus, Chronogram, Numeric Palindromes, Latticework of Letters. English/German.

Mathematrix Devoted to exploring the more entertaining (and generally lesser known) areas of mathematics. Can be enjoyed by anyone, from individuals with little or no math background to professors of the subject.

Mathmos Includes puzzles, jokes, quotations, poetry, and FAQs.

Maze_Classification_and_Algorithms A short description of mazes and how to create them. Definition of different mazetypes and their algorithms.

Mudd_Math_Fun_Facts An archive of interesting math facts for use in the classroom or just for fun. Browse by subject, difficulty, keywords, or try the "random" feature. Based at Harvey Mudd College.

Narcissistic_Numbers Those that are representable, in some way, by mathematically manipulating the digits of the numbers themselves.

The_Nine_Digits_Page Puzzles and problems connected with numbers using the digits 1-9.

Number_Recreations_by_Shyam_Sunder_Gupta Features interesting facts about different numbers. Includes favorite related links.

On_the_Puzzles_with_Polyhedra_and_Numbers This is an article on a set of didactical games edited by the Portuguese Mathematical Society (SPM).

One_Metaphor_Fits_All Explains Conway's audioactive decay that is generated by a particular kind of sequence. Includes illustrations and related resources.

Properties_of_Dice Polyhedral dice and their properties.

Recmath Includes pages on magic squares and polyomino patterns and contains related java applets.

Recreational_and_Educational_Computing A newsletter with programs, including optional supplemental PC disk. All back issues are available. Topics include puzzles and teasers, BASIC programming, letters, graphics, fractals, challenges, r

Recreational_Mathematics Links collected at CAMEL, the Canadian Mathematical Society website.

Recreational_Mathematics_(David_Eppstein) An extensive list of web resources for recreational math.

Recreational_Mathematics_Forum A forum for posting messages about math recreations. Hosted at Delphi.

Recreational_Mathematics_Topics By Steven Dutch. Symmetry, Crystals, Polyhedra and Tilings; Pythagorean triplets and other things about sums of powers; Geometry Classics.

Roman_Numerals Contains a introduction to Roman numerals including a translation of the digits used and a converter which can convert decimal to Roman numerals and vice versa.

Rubik\'s_Cube_Lecture_Notes Notes on the mathematics of the Rubik's cube.

SimonSingh_net Home of Simon Singh: author, journalist and TV producer, specialising in science and mathematics. Cryptography is one of his specialties, and his site has a lot of educational and fun content about c

Sir_Roger_Penrose A article about him and his interests and contributions to recreational mathematics.

Skytopia_-_Super_Magnet A colourful world built entirely using mathematical atoms and molecules. Pictures and animations demonstrate structures colliding and interacting. Animated GIF demonstrations.

The_Sound_of_Mathematics Algorithmic music determined by mathematics and by the musical preferences of a human. General MIDI files.

Spirocharts A windows application that creates mathematically precise spirograph drawings; savable as images.

Spirograph A java applet for creating Spirograph images.

Sportlab Combines high school and college math topics into sports applications.

Stunning_Friends_with_Math_Magic A collection of card tricks, number guessing games, paper and glue magic, and other math exercises.

Table_of_Numbers_Problem Given a m * n rectangle, place all numbers from 1 to mn that minimizes the sum of the products of rows and columns (both in Spanish and English).

Treasure_Troves___Book_List Book list including titles, authors, publishers, prices, page count and some have links to Amazon.com.

Wade_Edward_Philpott Profile and description of his mathematical games and puzzles.

Wade_Edward_Philpott_Collection A special collection at the University of Calgary Library.

Who_Can_Name_the_Bigger_Number? An essay by Scott Aaronson on the quest for ever-bigger numbers, from exponentials to Busy Beavers.

Australian_Map_Circle The Australian Map Circle (AMC) is a national group of map producers, users and curators, which acts as a medium of communication for all those interested in maps.

The_British_Cartographic_Society an association of individuals and organisations dedicated to exploring and developing the world of maps

This is sites2007.com cache of m/ as retrieved on 2008.12.02 sites2007.com's cache is the snapshot that we took of the page as we crawled the web. The page may have changed since that time.

Interactive Mathematics Activities var MyPageLoc = document.location;var MyPageTitle = document.title; Cut the knot: learn to enjoy mathematics

srExecute(); A math books store at a unique math study site. Learn to enjoy mathematics.

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Memory and MatchingArithmeticAlgebraLogicFractalsProbabilityVisual IllusionsCalculusMath MagicCombinatoricsCombinatorial GamesPuzzles & GamesGeometric FallaciesSocial SciencesElementary GeometryGeometryOutline MathematicsMiscellaneous DemonstrationsInteractive Mathematics ActivitiesMemory and MatchingMatch answersMemory - EasyMemory - MediumMemory - HardArithmetic2 Pails Puzzle3 Jugs Puzzle3 Jugs Puzzle in Barycentric Coordinates3-Term Arithmetic ProgressionAbacus in Various Number SystemsAlgorithm for Computing LCMAliquot GameArithmetic Operations in Various BasesBroken CalculatorCoin Game Collatz ConjectureCounting and GroupingDistributive LawEAN-13 EncodingEquivalent FractionsEven, Odd and Total Number of DigitsEuclid's GameFarey FractionsFlipping Items SimultaneouslyGeometric view of the Sieve of EratosthenesISBN EncodingKaprekar's Iterations and NumbersLattice MultiplicationLong MultiplicationLess, Equal, MoreMake An IdentityNapier BonesPlain Multiplication table up to 20×20Sieve of EratosthenesSieve of SquaresSoroban in Various Number SystemsSuan Pan in Various Number SystemsSums and ProductsSums of Powers of DigitsTwo Simple EquationsUniversal Product CodeZeros and NinesAlgebraAverages, Arithmetic and Harmonic MeansBinary Color DeviceBreaking Chocolate BarsCandy Game: Integer Iterations on a CircleChebyshev polynomialsComplex Numbers: A Dynamic ToolConstructible NumbersCounting Chips On a CircleCounting TrianglesCounting Triangles IIDivisibility ProblemDots and FractionsDucci SequencesEgyptian MultiplicationFirst Geometric Interpretation of Complex NumbersFour Pegs That Form a SquareFrieze PatternsGeometric Construction of Roots of Quadratic EquationGraph and Roots of a Third Degree PolynomialGraph and Roots of Quadratic PolynomialHeads and Tails (counting, invariance)Identities in the Multiplication Table Integer Iterations on a Circle II (superposition principle)Integers and RectanglesIntegers and Rectangles: a Proof by InductionIntegers and Rectangles: Two Simple ProofsInterest CalculationsJosephus Flavius GameLangford and Skolem SequencesLetter Count in a SentenceLights OutLogistic ModelLoop or HaltMean ValuesMerlin's Magic Squares (modular arithmetic, boolean and linear algebra)Mini Lights OutMinimax PrincipleMinimax TheoremModular ArithmeticNine SquaresParrondo Paradox Via Simpson ParadoxPeasant MultiplicationPennies in BoxesPlus or Minus (parity, invariance)PolygonalNumbersProizvolov's IdentityPythagorean TriplesPythagorean Triples CalculatorQuasigroup on a Triangular GridRectangle on a ChessboardRight ReplacementSelf-descriptive StringsSelf-documenting SentencesSierpinski's Gasket and Dihedral SymmetrySigns and Sums in a SequenceSigns in a MatrixSimple Cellular AutomatonSimpson ParadoxSolitaire in Two ColorsSquares and Circles (parity, invariance)Squares, Circles, and Triangles (modular arithmetic, invariance)Steinhaus' ProblemSum of Consecutive Integers is TriangularSum of Consecutive Odd Numbers is SquareSum of Consecutive Triangular Numbers is SquareToads And Frogs Puzzle (counting, logic, problem solving)Two Colors in Two RowsTwo Colors in Two Rows IIWhat's next?Word ProblemsLogicLewis Carroll's Bilateral DiagramsLewis Carroll's Trilateral DiagramsLewis Carroll's Logic GameVenn Diagrams IVenn Diagrams IIFractalsAll Peano CurvesApollonian GasketColor Cycling on the Mandelbrot SetCantor setsDot Patterns, Pascal Triangle and Lucas TheoremEmergence of ChaosFractal Curves and DimensionIterated Function SystemsIterations in the Mandelbrot SetKoch's SnowflakeMandelbrot Set and Indexing of Julia SetsPlane Filling Curves: Hilbert's and Moore'sPlane Filling Curves: Peano's and Wunderlich'sSierpinski Gasket By Common Trema RemovalSierpinski Gasket Via Chaos GameSierpinski Gasket by Trema RemovalThe Chaos Game: Address Space vs IFSVariations on the Theme of TremasVariations on the Theme of Tremas IIProbabilityBertrand's ParadoxBinomial DistributionBirds On a WireBuffon's NoodleChess Players TruelConditional Probability and Independent EventsFamily StatisticsLewis Carroll's pillow problemMonty Hall DilemmaParrondo ParadoxRandom Clock HandsStick Broken Into Three Pieces (Cartesian Coordinates)Stick Broken Into Three Pieces (Trilinear Coordinates)Who Needs Monty?Visual IllusionsAssimilation IllusionBalls and Shadows IllusionBrick Wall IllusionBulging Lines illusionCircular Poggendorff IllusionContinuous Line IllusionCube Counting AmbiguityDay's Sine IllusionDelboeuf IllusionDistorted Lines IllusionDivergent Spirals IllusionGerbino's IllusionHeaver: A Visual IllusionHeight/Width Interplay IllusionHering IllusionHermann Grid IllusionImportance of Occluders: Motion BindingJudd IllusionKanizsa TriangleMüller-Lyer IllusionNecker CubeOccluded Wheel IllusionOrbison IllusionParallelogram IllusionPerspective IllusionPoggendorff IllusionPoggendorff Illusion IIPonzo IllusionPonzo Illusion IIReverse Spoke IllusionRevolving Circles IllusionRotating Top IllusionScintillating Grid IllusionShepard's Parallelogram IllusionShifting Cube IllusionShimmer IllusionSimultaneous Contrast IllusionSimultaneous Contrast Illusion IISimultaneous Contrast: Koffka's IllusionSimultaneous Contrast: White's IllusionSimultaneous Contrast: White's Illusion, V-VariantStaircase IllusionTwisted Cord IllusionUnfolding Spirals IllusionWundt IllusionWundt Block IllusionZöllner's IllusionCalculusAddition and Subtraction of FunctionsCartesian Coordinate SystemDerivative of Sine and CosineDistance From a Point to a Straight LineEquations of a Straight LineEstimating Circumference of a CircleFunction, Derivative and IntegralGraph of a PolynomialGraph of a Polynomial Defined by Its RootsHorner's MethodInflection Points of Fourth Degree PolynomialsLagrange InterpolationMaximum Volume of a Cut Off BoxMistrust Intuition of the InfiniteNaturally Discontinuous FunctionsNewton's MethodRiemann Sums - Function IntegrationRolle's and Mean Value TheoremsTaylor Series Approximation to CosineTwo Circles and a LimitMath MagicAn Arithmetic Magic TrickArithmetic magic matrixBachet's Magic TrickBarcode MagicCalendar MagicGergonne's Magic TrickHummer's Mind ReaderMagic in SquareMath TelepathyNumber Guessing GameTwo Numbers Guessing GameCombinatorics3-Colors Tower of HanoiAffirmative Action ProblemBalanced Incomplete Block Design on a Triangular GridBicolor Tower of HanoiBlithe 12Cheapest Link & Kruskal's Algorithms - skill practiceChvatal's Art Gallery TheoremCoin changeColoring a GraphCritical Path in a Weighted Digraphde Bruijn CycleDominoes on a ChessboardEuler & Hamilton Paths - skill practiceFive Lattice PointsFlipping Items Simultaneously IIFlipping pancakesGray CodesGroup multiplication of permutationsHanoingHappy 8Hex Can't End in a DrawHow to define a permutationInfinite Latin SquareJumping Isn't EverythingLatin SquaresLeibniz and Pascal TrianglesLife-like Automaton With Definable RulesLight Bulbs in a CircleListing All CombinationsListing All PermutationsListing All Permutations: Johnson-Trotter MethodLucky 7Make Your Move, Kid!Marriage Problem, simulationMazesMonotone Number SequencesNumber sequences and PigeonholeParty AcquaintancesPermutations as a Product of TranspositionsProduct of PermutationsProject SchedulingProperty of the Powers of 2Recombining PermutationsSam Loyd's FifteenScrub Tile PuzzleShuttle PuzzleSimple GraphsSliders (slider games on torus, Moebius strip, projective plane, permutations, cycles)Straight Tromino on a ChessboardThe Game of LifeTool for Constructing Orthogonal Latin SquaresTower of HanoiTower of Hanoi, the Hard WayTwo Men of TibetUniversal ColoringY Can't End in a DrawCombinatorial GamesDate Game Fraction GameGrundy's Game Hex 7Kayles Nim Nimble Northcott's game One Pile Plainim Plainim Misère Scoring Scoring Misère Silver Dollar Game Silver Dollar Game With No Silver Dollar Sticks, Jess realization of Scoring MisèreSticky ProblemSticky Problem IISubtraction Game TacTixTake-Away Games Turning Turtles Wythoff's Nim Wythoff's Nim II Puzzles & Games3-Chain4×4×4 Tic Tac Toe (spacial visualization)Achieve the EquilibriumBulls and CowsCaterpillarChanging Colors (combinatorics, invariance)Color BallsComputer Mastermind (logic and problem solving)Eight Digits PuzzleFarmer and Wife To Catch Rooster and Hen (invariance, city block distance)Fif (multiple representations)Fill a Hexagonal Grid (space visualization)Fish Soup Game (multiple representations)Four Knights (multiple representations)Full HouseGoat, Cabbage and Wolf to move across a river (multiple representations)Hare and HoundsJam (multiple representations)Looping Chips (multiple representations)Mastermind (logic and problem solving)Mastermind Variants (logic and problem solving)Mirror MazePeg Solitaire (logic, problem solving, subproblems)Pick A Label (logic, problem solving)Reverse Solitaire (logic, problem solving, subproblems)Sending scouts into the desert (algebra, geometric series, problem solving) Seven Coins Puzzle (multiple representations)Shuttle Puzzle PracticeSolitaire on a Circle (iterations, invariance)Stones in CupsSuper NimThugs and BowmenTiling a Triangulated Hexagon (a proof without words)Toads And Frogs in 2 dimensions (repeated application of same idea)Tromino PuzzleVector Addition and SubtractionVowel MovementWolf and RabbitGeometric FallaciesA Circle With Two CentersAll Triangles Are IsoscelesCurry's ParadoxDelian Problem SolvedA Faulty DissectionHooper's ParadoxJohn Sharp's ParadoxLangman's ParadoxPopping A SquareRouse Ball's FallacySam Loyd's Son's DissectionTwo Perpendiculars From a Point to a LineSocial ScienceAdams' Apportionment MethodFair Division: Method of Lone DividerFair Division: Method of MarkersFair Division: Method of Sealed BidsFast Power IndicesHamilton's Apportionment MethodHuntington-Hill Apportionment MethodJefferson's Apportionment MethodSocial ChoiceWebster's Apportionment MethodWeighted Voting and Power IndicesElementary GeometryA Property of Equiangular PolygonsAl-Nayrizi's ConstructionAngle: An Illustrated ClassificationAngle BisectorAngle Subtended by a DiameterArea of Median TriangleArea of the Union of Two SquaresArithmetic in DisguiseBuilding a BridgeCarpet With a HoleCircles and Semicircles in RectangleCircumcenter on Angle BisectorClassification of QuadrilateralsCommon Chord and a TangentConic Sections as Loci of PointsConstruction of the Angle BisectorConstruction of the Perpendicular BisectorDiagonal CountDissection of Cyclic QuadrilateralDivide a Circle into N Parts of Equal AreaE. W. Dijkstra's Proof of the Pythagorean TheoremEight Equal TangentsEquidecomposition of a Rectangle and a SquareEquidecomposition of Two RectanglesEquidecomposition of a Triangle and a RectangleEquidecomposition of a Triangle and a Rectangle IIEquidecomposition of Two ParallelogramsEquilic Quadrilateral IEquilic Quadrilateral I, A VariationEquilic Quadrilateral IIEuclid's Segment DivisionExistence of the CircumcenterFibonacci BamboozlementFamous TheoremFinding Circle Center By Ruler AloneFour Hinged SquaresGeoboardHarmonic Mean SangakuHippocrates' Squaring of a LuneHuygens' proof of the Pythagorean TheoremInscribed and Central Angles in a CircleInscribed AnglesInscriptible Quadrilateral: An IllustrationMaimed CakeMathematics in PizzeriaOctagon in ParallelogramOctagon in Parallelogram: Overlapping RegionsOlof Hanner's Jigsaw PuzzleOrthocenters of Two Triangles Sharing Circumcenter and BasePappus' Generalization of Euclid I.47Orthodiagonal and Cyclic QuadrilateralsParallel Chords IIParallel Lines in a QuadrilateralPolygon MetamorphosisProperty of Angle BisectorsPythagorean Theorem By DissectionPythagorean Theorem By Dissection IIPythagorean Theorem by Hinged DissectionPythagorean Theorem by Hinged Dissection IPythagorean Theorem by Hinged Dissection IIPythagorean Theorem: J. Adams' Proof by DissectionPythagorean Theorem: Versluys' Proof by DissectionPythagoras' Theorem By Sheer ShearingPythagoras' Theorem By SimilarityPythagoras' Theorem Solely By SlidingPythagorean Segment DivisionQuadrilateral With Equal Opposite Sides And AnglesRegular Polyhedra - Platonic SolidsTetrahedronOctahedronCubeIcosahedronDodecahedronSecant AnglesSecant Angles IIShearing a Polygon into a Triangle of Equal AreaSimple Quadrilaterals Tessellate the PlaneShearing and Translation in Pythagorean PantsSquare From NowhereSquare in ChairSquaring a RectangleThree Touching CirclesTranslation TransformTriangle Areas in a ParallelogramTriangle Areas in a Parallelogram IITriangle ClassificationTrigonometric FunctionsTwo Intersecting CirclesTwo Symmetric Triangles Are Directly EquidecomposableTwo Symmetric Triangles Are Directly Equidecomposable IITwo Symmetric Triangles Are Directly Equidecomposable IIITwo Symmetric Triangles Are Directly Equidecomposable IVTwo Touching CirclesVan Schooten's and Pompeiu's TheoremsViviani's TheoremViviani's Theorem II Geometry120° Breeds 90°2N-Wing Butterfly Theorem3 Isosceles Trapezoids5-Star and A Circle6 to 9 Point Circle60o Breeds 90o9-point Circle as a Locus of ConcurrencyA Circle Related to Incenter and CircumcenterA Line in Triangle Through the CircumcenterA Sangaku Follow-Up on an Archimedes' LemmaA Sangaku: Two Unrelated CirclesA Sangaku with an Egyptian AttachmentA Sangaku with Many Circles and SomeA Stronger Triangle InequalityAdams' CircleAddition of Radius-VectorsAltitudes and the Power of a PointAn Isoperimetric TheoremAngle Bisector in ParallelogramAngle Bisector in Touching CirclesAngle Bisectors and Perpendiculars in a QuadrilateralAngle Bisectors in a QuadrilateralAngle Bisectors On CircumcircleAngle Preservation PropertyAngle Trisection by ArchimedesAngle Trisection by HippocratesAngle Trisection by Paul VjecsnerAngle Trisectors on CircumcircleAngles in Triangle Add to 180oAnother Pair of Twins in an ArbelosAnticomplementary Triangle SurpriseAntiparallelApollonian Circles TheoremApollonius ProblemApplication of Ceva's TheoremArchimedes' QuadrupletsArchimedes Triangle and Squaring of ParabolaArchimedes' Twin Circles and a BrotherArea of an ArbelosArea of ParallelogramArea of TriangleAreas and Centroid in a TriangleAreas in TriangleAreas in Triangle IIArithmetic Mean SangakuArithmetic Mean Sangaku IIAround the IncircleAround the Incircle in a PolygonAsymmetric Propeller IAsymmetric Propeller IIAsymmetric Propeller IIIBarycentric Coordinates: a ToolBevan's Point and TheoremBisectal CircleBook of Lemmas: Proposition 1Book of Lemmas: Proposition 2Book of Lemmas: Proposition 3Book of Lemmas: Proposition 5Book of Lemmas: Proposition 6Book of Lemmas: Proposition 9Book of Lemmas: Proposition 10Book of Lemmas: Proposition 12Book of Lemmas: Proposition 13Böttcher's Proof of the Pythagorean TheoremBöttcher's Proof VariantBottema Shatters Japan's SeclusionBottema's TheoremBottles in a Slanted RackBottles in a Wine RackBottles in a Wine Rack: Proofs and GeneralizationsBrahmagupta's TheoremBrianchon in EllipseBrianchon's TheoremBride's ChairBroken Chord TheoremBroken Chord Theorem by Paper FoldingBroken Chord Theorem: G. Patruno's proofBroken Chord Theorem: S. Anderson's proofButterfly in EllipseButterfly ProblemCantor's TheoremCardioid As Envelope of CirclesCardioid As EpicycloidCarnot's TheoremCarpets in a ParallelogramCarpets in a QuadrilateralCarpets in a Quadrilateral IICarpets TheoremCarpets Theorem With ParallelogramsCenter Circles and Their ChainsCentroids in a PolygonCeva and Menelaus Theorems for Angle BisectorsCeva's TheoremCeva's Theorem (PWW)Cevian NestCevian TriangleChain of Inscribed CirclesChasles' Theorem, a ProofCherchez le quadrilat�re cycliqueCherchez le quadrilat�re cyclique IIChords, Concurrency and Orthic TriangleChords in CardioidCircle and Hyperbola as Lighthouse CurvesCircle Chains and Inscribed AnglesCircle Concurrency and Spiral SimilarityCircle Crosses TriangleCircle Division by Euclid and LeonardoCircle Inscribed in a Circular SegmentCircle of SimilitudeCircle-Stacking TheoremCircles And ParallelsCircles and Reflections in a TriangleCircles in Morley's TrianglesCircles Lined on the Legs of a Right TriangleCircles On CeviansCircles Tangent to CircumcircleCircles through the OrthocenterCircumcevian TriangleCleavance CenterCleaverClifford ChainClifford's LemmaCoaxal Circles TheoremColburn's Proof of the Pythagorean TheoremCommon Tangents to Two Circles ICommon Tangents to Two Circles IIComplete QuadrilateralConcyclic Points in Equilateral BumpsConcurrency in Analytic GeometryConcurrency in ArbelosConcurrency in the Intouch TriangleConcyclic Circumcenters: A Dynamic ViewConcyclic Points in a TriangleConsecutive Isosceles DecompositionConway's CircleCopernicus' TheoremCrossed-Lines Construction of Shapes of Constant WidthCyclic HexagonCyclic IncentersCycloidsDiameters and ChordsDirectly Similar FiguresDesargues' TheoremDiscovery of Duane DeTempleDividing a Segment into N parts: Besteman's ConstructionDividing a Segment into N parts: Besteman's Construction IIDividing a Segment into N parts: GLaD ConstructionDividing a Segment into N parts: SaRD ConstructionDividing Evenly a QuadrilateralDividing Evenly a Quadrilateral IIDouble Generation TheoremDouglas' Theorem (complex variables, linear algebra)Droz-Farny CirclesDroz-Farny Line TheoremDual to Pappus' TheoremDynamic Construction of Ellipse and Other CurvesEasy Construction of Bicentric QuadrilateralEasy Construction of Bicentric Quadrilateral IIEight Point CircleEllipse, how to drawEllipse in ArbelosEqual Angles in Two CirclesEqual Angles in Two Circles IIEqual Areas In Parallelogram à la PythagorasEqual Incircles TheoremEquichordal CurvesEquilateral Triangle, Straight Line and Tangent CirclesEquilateral Triangles on Diagonals of Antiequilic QuadrilateralEquilateral Triangles on Segments of Equilic QuadrilateralEquilateral Triangles On Sides of a ParallelogramEquilateral Triangles On Sides of a Parallelogram IIEquilateral Triangles on Sides of a QuadrilateralEuler Line Cuts Off Equilateral TriangleEuclid I.43Euclid I.43 ExtendedEuclidean Construction of Center of EllipseEuclidean Construction of Tangent to EllipseExtouch Triangle in Poncelet PorismEyeball TheoremExternal Angle BisectorFagnano's problemFagnano's problem IIFagnano's Problem, Third SolutionFagnano's Problem, Fourth SolutionFagnano's Problem in ReverseFermat point and 9-point CentersFermat's PointFeuerbach's theoremFeuerbach's Theorem: A ProofFirst Vecten PointFive CardioidsFive Concyclic PointsFive Incircles in a SquareFive Incircles TheoremFixed Point of Circles Orthogonal to the Given OneFixed point on a rod rotating around a triangleFocal Properties of ParabolaFoot of Altitude and Minimum DistanceFour Centroids and ParallelsFour 9-Point Circles in a QuadrilateralFour Circles In a TriangleFour Concurrent Lines in a Cyclic QuadrilateralFour Incident CirclesFour Incircles in Equilateral TriangleFour Pedal CirclesFour Touching CirclesFour Touching Circles IIFour Touching Circles IIIFour Triangles, One CircleFour Turtles (or Bugs, or Dogs, etc.)Friendly Kiepert's PerspectorsFrom Foci to a Tangent in EllipseFundamental Theorem of 3-Bar MotionFuss' TheoremGeneralizing a Romanian Olympiad ProblemGergonne and Medial Triangles Are OrthologicGergonne and Soddy Lines Are PerpendicularGergonne in EllipseGlide ReflectionGolden Ratio in an Irregular Pentagon, Construction I Golden Ratio in an Irregular Pentagon, Construction II Golomb's inductive proof of a tromino theoremGothic ArcGrebe's TheoremGreg Markowsky's Problem for ParabolaGriffiths Points in Cyclic QuadrilateralHarmonic RatioHart CircleHart's InversorHaruki's LemmaHeron's ProblemHexagon Parallel to Medial TriangleHexagon Parallel to Orthic TriangleHinged SquaresHjelmslev TheoremHofstadter Triangles and PointsHomothetyHypocycloid FamiliesIan McGee's ObservationIllustration of Pascal's TheoremIncenters in Cyclic QuadrilateralIncidence in Feuerbach's TheoremIncident Center Circles and CardioidIncircles, Circumcircles and Inscribed AnglesInscriptible and Exscriptible QuadrilateralsInternal Tangents to Three CirclesIntouch Triangle in Poncelet PorismInversion: Reflection in a CircleInversion in the IncircleInversion ToolInversion with Negative PowerIsogonal and Isotomic ConjugalitiesIsogonal ConcurrencyIsogonal image of the circumcircleIsosceles on the Sides of a TriangleIsotomy and Isogonality Hand-in-HandIterations in Geometry, an exampleIterations in Geometry, GeneralizationIterations on Euler LinesKiepert's TheoremKürschak's Tile and TheoremLaw of CosinesLaw of Cosines: PWWLaw of Cosines: An Unfolded VariantLa Hire's TheoremLa Hire's Theorem, a VariantLa Hire's Theorem in EllipseLean Napoleon's TrianglesLighthouse CurvesLocus of Points in a Given Ratio to Two PointsMalfatti's ProblemMalfatti's Problem, Hart's SolutionMaxwell's TheoremMedian in Touching CirclesMedians in a QuadrilateralMenelaus and Ceva TheoremsMenelaus From CevaMidline in Similar TrianglesMidpoints from Gergonne TriangleMidpoints of the Lines Joining In- and ExcentersMinkowski's addition of convex shapesMiquel's PointMiquel's Point of a 4-line Via Spiral SimilarityMirror on the WallMirror property of the altitudesMirror Property of Altitudes via Pascal's HexagramMixtilinear Circles and ConcurrenceMonge via DesarguesMonge via Desargues IIMore Bottles in a Wine RackMorley ConstellationMorley's TheoremMorley's Theorem, Cardioids and SuchMorley's Theorem, G. Zsolt Kiss' proofNagel LineNagel pointNagel Point of Medial TriangleNagel's TheoremNapoleon Theorem by Plane TessellationNapoleon's Theorem by TransformationNeuberg SangakuNewton's Construction of ConicsNewton's TheoremNine Point CircleNo Equilateral Triangles, PleaseNobbs' Points, Gergonne LineNon-classic Way To Draw CardioidOn Bottema's ShouldersOn Bottema's Shoulders IIOne Sided Surface in 4DOptical Property of EllipseOptimization Problem in Acute AngleOrthocentric System From RectangleOrthogonality in Isosceles TrianglesOrthologic Triangles in a QuadrilateralOrthopolePairs of Incircles in a QuadrilateralPappus' TheoremParabola As Envelope of Straight LinesParabola As Envelope IIParabolic MirrorParagonParahexagonParallel ChordsParallel Chords in EllipseParallel Lines and Similar TrianglesParallelogram and Similar TrianglesParallelogram LawParallelogram Law: A PWWParallelogram Law: A TessellationPascal in a Cyclic QuadrilateralPascal Lines: Steiner and Kirkman TheoremsPascal Lines: Steiner and Kirkman Theorems IIPascal's TheoremPeaucellier LinkagePedal CollinearitiesPedal PolygonsPedal Triangle and Isogonal ConjugacyPedoe's TheoremPerigal's Proof of the Pythagorean PropositionPerpendicular Bisectors in an Inscriptible QuadrilateralPerpendicular Bisectors in an Inscriptible Quadrilateral IIPinning Butterfly on Radical AxesPivot TheoremPoint common to two similar rectanglesPolar CirclePole and Polar with respect to a TrianglePoles and PolarsPoles, Polars and QuadrilateralsPolygon from midpoints of its sidesPolygons Formed by Perpendicular BisectorsPoncelet's PorismPoncelet's Porism in EllipsesPoncelet's TheoremProblem in an Equilateral TriangleProblem in an Equilateral Triangle IIProblem In an Isosceles Right TriangleProblem in Three SquaresProblem of Equal StepsProblem of Equal Steps IIProblem of polygon constructionProblem with Equilateral TrianglesProduct of RotationsProjections on Internal and External Angle BisectorsProjective Collinearity in a QuadrilateralProjective Generalization of Maxwell's TheoremProjective Proof of Pascal's TheoremProof Without Words for the Pythagorean TheoremProperties of the Circle of SimilitudeProperty of 6-ParpolygonProperty of Angle Bisectors IIProperty of Circumscribed QuadrilateralsProperty of Points Where In- and Excircles Touch a TriangleProperty of RhombiProperty of the Line IOProperty of the Line IO IIProperty of the Line IO: a proof from the BookPythagoras and Vecten Break Japan's IsolationPythagorean Condition in An Isosceles Right TrianglePythagorean Theorem: Subtle Dangers of Visual ProofPythagorean Theorem By EuclidPythagorean Theorem By Plane TessellationPythagorean Theorem By Hexagonal TessellationPythagorean Theorem By RearrangementPythagorean Theorem By Shearing and Rotations IPythagorean Theorem By Shearing and Rotations IIPythagorean Theorem in an Orthodiagonal QuadrilateralQuadrilaterals Formed by Perpendicular BisectorsQuest for ParagonMathPro LogoRadical Axis and Center, an ApplicationRadical Axis of Circles Inscribed in a Circular SegmentRadical CenterRadius and Construction of a Mixtilinear CircleRadius of a Circle by Paper FoldingRectangle in ArbelosReflection In LineReflections in EllipseReflections of a Line Through the OrthocenterReflections of a Point on the CircumcircleReflections of the OrthocenterRemarkable Line in a QuadrilateralRemarkable Line in Cyclic QuadrilateralRendezvousRight Isosceles Triangles on Sides of a QuadrilateralRotation TransformRotations in DisguiseRusty Compass Construction of Equilateral TriangleSalinon: from Archimedes Book of LemmasSangaku Iterations, Is it Wasan?Sangakus with a Mixtilinear CircleSangaku with Three Mixtilinear CirclesSeven Circles TheoremSquares in ArbelosSecant, Tangents and OrthogonalitySee-Saw LemmaSegment TrisectionShape of Constant WidthShearing Butterflies in QuadrilateralsSiamese TrianglesSiamese Triangles IISimilar Triangles on Sides of a QuadrilateralSimilar Triangles on Sides and Diagonals of a QuadrilateralSimson LineSimson Line From Isogonal PerspectiveSimson Lines Of Diametrically Opposite PointsSimsons and 9-Point Circles in Cyclic Quadrilateralsin(N)Six Circles Theorem (Elkies)Six Circles Theorem (Evelyn)Six Concyclic PointsSix Incircles in an Equilateral TriangleSix Point CircleSoddy Circles and David Eppstein's CentersSperner's LemmaSpira Mirabilis - Wonderful SpiralSquare in a Right TriangleSquare Inscribed in a TriangleSquare Inscribed in a Triangle IISquares Inscribed In a Triangle IIISquares on Sides of a QuadrilateralSquinting Eyes TheoremStar Construction of Shapes of Constant WidthSteiner's ChainSteiner's porismStraight Edge Construction of PolarSymmedian and AntiparallelSymmedian and 2 AntiparallelsSymmedian and the TangentsSymmedian in a Right TriangleTangency Point of Two CirclesTangent and SecantTangent Circles and an Isosceles TriangleTangent Circles in a ParallelogramTangent in ConcurrencyTangents and Diagonals in Cyclic QuadrilateralTangents, Perpendiculars and Geometric MeanTesseractThébault's Problem I Thébault's Problem II Thébault's Problem III Thébault's Problem III, ProofTheorem of Complete QuadrilateralThree Concurrent CirclesThree Congruent Circles by ReflectionThree Congruent Circles by Reflection IIThree Congruent Circles by Reflection IIIThree Incircles In a Right TriangleThree Incircles in a TriangleThree Isosceles TrianglesThree Parabola TangentsThree Parallels in a TriangleThree Points on a ParabolaThree Roads, Three TravelersThree Similar PolygonsThree Similar TrianglesThree Similar Triangles (but differently oriented)Three Similar Triangles (but differently oriented) IIThree Squares and Two EllipsesThree Tangent CirclesThree Tangents TheoremThree Tangents Theorem IIThree Tangents, Three SecantsToothpick Construction of a SquareTouching CirclesTouching Circles and ConcurrencyTriangle and Segment Count in a PolygonTriangle GeometryTriangle Sliding on Two Straight LinesTriangles, Squares and Areas from Temple GeometryTriangles with Equal AreaTriangular BilliardTrigonometric Form of Ceva's Theorem (a tool for discovery of trigonometric identities and other problems)Tromino as a Rep-tileTucker CirclesTucker Circles Through HomothetyTwin Segments in ArbelosTwo Butterflies TheoremTwo Butterflies Theorem IITwo Butterflies Theorem IIITwo Circles in a ParallelogramTwo Circles Inscribed in a ParallelogramTwo Circles in a SquareTwo Circles in a Square IITwo Circles in an AngleTwo Circles on a Side of a TriangleTwo Circumcircles And Two Pairs of ParallelsTwo Circumcircles in TriangleTwo Congruent Circles by ReflectionTwo Homotheties in a ParallelogramTwo Proofs of MenelausTheoremTwo QuadrilateralsTwo Quadruplets of Tangent CirclesTwo Rectangles in a RectangleTwo Simsons in a TriangleTwo Squares and Another SquareTwo Triples of Similar TrianglesTwo Tangents to ParabolaTwo Triangles With Common Base and AltitudeVarignon ParallelogramVecten's CollinearityVecten's MeshVecten's TheoremVersatile TheoremWeitzenböck InequalityWhat does one see inside a spherical mirror?When a Triangle is EquilateralWittenbauer's ParallelogramY. Sawayama's LemmaZaslavsky's theoremOutline (Fill-It-In) MathematicsA bunch of fill-it-in outline problems and solutionsInteractive Word ProblemsInteractive Logic ProblemsInteractive Arithmetic ProblemsNumber Theory ProblemsFill-it-in Geometry ProblemsArithmetic Practice ProblemsMiscellaneous DemonstrationsCalculation of the Digits of pi by the Spigot AlgorithmCalculation of the Digits of pi (Faster Version)Convex Polygon Is the Intersection of Half PlanesDisappearing LinesDisappearing RectanglesDistance Between StringsExperimentation with Dynamic Geometry Software: An ExampleGenetic Algorithm Solves the Toads and Frogs PuzzleImpossible ForkImpossible FrameMorphingPossible or Impossible?Projectile TrajectoryRandom Dot StereogramsRatchet EffectRotating GearsSorting AlgorithmsStructural Constellation

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Math Magic By Computer 2008 December

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Interactive java puzzles and activities in different mathematical topics.

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