Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 89
OMETRY [IX, § 89 89. To Find the Development of a Solid with Plane Faces.Let the given solid be the frustum of an irregular four-sidedpyramid, Fig. 115. Each face is a quadrilateral, which can bedivided into two triangles by means of one diagonal. Never-theless it is easier to begin by finding the…
Geometry, Descriptive
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