Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 142
es multiplied by tinslant height. For, if we suppose the frustum ofa right pyramid to be inscribed inthe frustum of a cone, its convexsurface will be equal to half the pro-duct of its slant height by the perim-eters of its two bases. But if weincrease the number of sides of the polvgon… … <42 GEOMETRY Of Parallelopipedon THEOREM X. Two rectangular parallelopipedons, having equal altitudes andequal bases, are equal. Let E—ADCD, and F—KG HI, be two rectangular [jarullelopipedons having equal % p bases, AC and KH, and equalaltitudes, AE and KF: thenwill they be equal. For, apply the…
Geometry · Plane trigonometry
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