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 150
OF GEOMETRY. BOOK VI. 149 … PROP. C. THEOR. If from any angle of a triangle a straight line be drawnperpendicular to the base ; the rectangle contained by thesides of the triangle is equal to the rectangle contained bythe perpendicular, and the diameter of the circle describedabout the triangle. Let ABC be a triangle, and AD…
Euclid's Elements · Geometry · Trigonometry
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