The normal elementary geometry : embracing a brief treatise on mensuration and trigonometry : designed for academies, seminaries, high schools, normal schools, and advanced classes in common schools (1884)
Brooks, Edward, 1831-1912 · Philadelphia : Christopher Sower Co. · leaf 127
. An oblique prism is equivalent to a right prism whose base isequal to a right section of the oblique prism, and whose alti-tude is equal to a lateral edge of the oblique prism. F K T-ieiABCDE—A be an oblique prism.At any point F, in the edge A A, pass aplane perpendicular to A A, forming theright… … BOOK VI. 123 FOHIK, parallel and equal to FOHIK. The prismFOHIK —F is a right prism whose base is the right sec-tion FOHIK, and whose altitude, FF, is equal to the lateraledge of the oblique prism. Now, the truncated prism ABODE —F is equal to thetruncated prism ABCDE-F (Th. III. Cor. 2) ; if to…
Geometry · Plane trigonometry
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