De circuli magnitudine inventa

A B C A D B A E B æqua æquabitur æqualis angulos rectos Archimedes arcu bifariam centro centrum circuli portio circumfcripti circumferentiæ cubus cujus defcribatur demonftrandum diameter diametro diametrum Dico dodecagoni drato duabus tertiis duæ tertiæ ducatur dupla erunt eſt exceffus fecet ficut fimul fubtenfa funt fupra Geometria gulo gulum hæc infcripti infcriptum ipfi ipfius Itaque jungantur latera laterum latus linea major erit ratio majorem effe majus erit manifeftum metrum minorem minùs oftendendum parallela partium perimeter perimetri peripheria polygoni polygonum portio femicirculo minor portionem portionis proinde propter triangulos fimiles punctum quadr quadratis quadrato quadratum quæ radius recta rectang rectangulum Sto circulus tangenti THEOR trian triangulum triens triente trianguli tripla unà verò