Advanced geometry for high schools : synthetic and analytical (1919)
McDougall, A. H. (Alexander Hiram), 1859-1946 · Toronto : Copp, Clark · leaf 31
18 synthetic geometry Areas of Rectangles13. If from the vertex of a triangle a straight lineis drawn perpendicular to the base, the rectanglecontained by the sides of the triangle is equal tothe rectangle contained by the perpendicular andthe diameter of the circumcircle of the triangle. AX ± BC…
Geometry · Geometry, Analytic
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