Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 85
having equal bases andequal altitudes, are equivalent. THEOREM II Triangles which have equal bases and °.qual altitudeequivalent. Place the base of one triangle F D_____E_ on that of the other, so that ABCand ABD shall be two trian-gles, having a common base AB,and for their altitude, the… … BOOK IV. 85 Of Triangles and Parallelograms since these parallelograms have a common base and equalaltitudes, they will be equivalent (Th. i). But the triangle ABC is half the parallelogram BE (Bk. LTh. xxiii); and A BD is half the equal parallelogram BF.hence, the triangle ABC Is equivalent :o the…
Geometry · Plane trigonometry
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