Elements of geometry : containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids : to which are added, Elements of plane and spherical geometry (1826)
Playfair, John, 1748-1819, Euclid · Philadelphia : Marot & Walter · leaf 101
ches; there-fore the six arches AB, BC, CD, DE, EP, FA are equal to one another: and equal arches are subte.nded bjequal (29. 3.) straight lines; therefore the six straight lines areequal to one another, and the hexagon ABCDEF is equilateral. Itis also equiangular; for, since the arch AF is equal… … OF GEOMETRY. BOOK IV. 101 AFE la equal to FED: in the same manner it maybe demonstrated,that the other angles of the hexagon ABCDEF are each of themequal to the angle AFE or FED; therefore the hexagon is equiangu-lar; it is also equilateral, as was shown; and it is inscribed in thegiven circle…
Euclid's Elements · Geometry · Trigonometry
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![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-33-44.webp)
![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-92-168.webp)
