Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 113
EM IX. To make a rectangle that shall be equivalent to a given triangle. Let ABC be the given triangle. Bisect the base AB at D, and drawDH perpendicular to AB. Through C,the vertex of the triangle, draw CHGparallel to AB, and draw BG perpen-dicular to it: then will the rectangleDG be equivalent to… … BOOK IV 113 Appendix
Geometry · Plane trigonometry
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