Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 86
seA D, and equal altitudes, are equivalent (Th. ii). But the tri-angle ABC is half the parallelogram BD (Bk. I. Th. xxiii):hence, the triangle ABE is half the parallelogram BD (Ax. IV Cor. Hence, if a triangle and a rect-angle have equal bases and equal alti-tudes, the triangle will be half… … 8G GEOMETRY. Of Rectanglco D C 11 A B E 71 F THEOREM IV. Rectangles which are described on equal lines are equivalent Let BD and FHbe two rectangles,having the sides AB, BC, equal tothe two sides EF, FG, each toeach: then will the rectangle ABCD,described on the lines AB, BC, beequivalent to the…
Geometry · Plane trigonometry
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