几何绘图Pythagorea

Studygeometrywhileplayingonsquaredpaper.
>330+tasks:fromverysimpletoreallygeometricpuzzles
>25subjectstoexplore
>76geometrictermsinaglossary
>Easytouse
>Friendlyinterface
>Trainyourmindandimagination
***About***
Pythagoreaisacollectionofgeometricpuzzlesofdifferentkindthatcanbesolvedwithoutcomplexconstructionsorcalculations.Allobjectsaredrawnonagridwhosecellsaresquares.Alotoflevelscanbesolvedusingjustyourgeometricintuitionorbyfindingnaturallaws,regularity,andsymmetry.
***Justplay***
Therearenosophisticatedinstruments.Youcanconstructstraightlinesandsegmentsonlyandsetpointsinlineintersections.Itlooksveryeasybutitisenoughtoprovideaninfinitenumberofinterestingproblemsandunexpectedchallenges.
***Alldefinitionsatyourfingertips***
Ifyouforgotadefinition,youcaninstantlyfinditinthe’sglossary.Tofindthedefinitionofanytermthatisusedinconditionsofaproblem,justtapontheInfo(“i”)button.
***Isthisgameforyou?***
Euclideauserscantakeadifferentviewofconstructions,discovernewmethodsandtricks,andchecktheirgeometricintuition.
Ifyouhavejuststartedyouracquaintancewithgeometry,thegamewillhelpyouunderstandimportantideasandpropertiesoftheEuclideangeometry.
Ifyoupassedthecourseofgeometrysometimeago,thegamewillbeusefultorenewandcheckyourknowledgebecauseitcoversmostofideasandnotionsoftheelementarygeometry.
Ifyouarenotongoodtermswithgeometry,Pythagoreawillhelpyoutodiscoveranothersideofthesubject.WegetalotofuserresponsesthatPythagoreaandEuclideamadeitpossibletoseethebeautyandnaturalnessofgeometricconstructionsandevenfallinlovewithgeometry.
Anddonotmissyourchancetofamiliarizechildrenwithmathematics.Pythagoreaisanexcellentwaytomakefriendswithgeometryandbenefitfromspendingtimetogether.
***Maintopics***
>Length,distance,andarea
>Parallelsandperpendiculars
>Anglesandtriangles
>Angleandperpendicularbisectors,medians,andaltitudes
>PythagoreanTheorem
>Circlesandtangents
>Parallelograms,squares,rhombuses,rectanglesandtrapezoids
>Symmetry,reflection,androtation
***WhyPythagorea***
PythagorasofSamoswasaGreekphilosopherandmathematician.Helivedin6thcenturyBC.Oneofthemostfamousgeometricfactsbearshisname:thePythagoreanTheorem.Itstatesthatinaright-angledtriangletheareaofthesquareonthehypotenuse(thesideoppositetherightangle)isequaltothesumoftheareasofthesquaresoftheothersides.WhileplayingPythagoreayouoftenmeetrightanglesandrelyonthePythagoreanTheoremtocomparelengthsofsegmentsanddistancesbetweenpoints.ThatiswhythegameisnamedafterPythagoras.