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 91
he angle BKC equal to the angle DFH; andthrough the points A, B, C, draw the straight lines LAM, MBN, NCLtouching (17 3.) the circle ABC : Therefore, because LM, i\IN,NLtouch the circle ABC in the points A, B, C, to which from the centreare drawn RA, KB, KC, the angles at the points A, h, C, are… … OF GEOMETRY. BOOK IV. 91 the other two AKB, AMB are equal to two right angles: But the an*6fies DEG, DEF are likewise equal (43i 1.) to two right angles; there-jPore the angles AKB, AiVlB are equal to the angles DE(J, DEF, ofwhich AKB is equal to DEG; wherefore the remaining angle AMB isequal to…
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-32-41.webp)