Hart, C. A. (Clara Avis), b. 1863, Feldman, Daniel D., b. 1872 · New York, American Book Co · leaf 456
2. .-. area abc- = {af + fo -\ ) 2 ttE = Ae . 2 7ri?. 968. Cor. n. If half of a regular polygon with an evennumber of sides is inscribed in a semicircle, the area oftlve surface generated by its semi-perimeter as it revolves aboutthe diameter of the semicircle asan axis, is equal to the product… … 446 SOLID GEOMETRY 969. Cor. m. If halves of regular polygons vnth thesame even number of sides are civeumscvihed about, andinseribed in, a semicircle, then hy repeatedly doubling thenumber of sides of these polygons, and making the poly-gons always regular, the surfaces generated by the…
Geometry, Plane · Geometry, Solid
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