Higbee, F. G · New York, John Wiley & Sons · leaf 107
ramid whose base is in a plane parallel to H. By Article 56find where each edge pierces the cutting plane S, as at X, Y, etc.Join these points in order and the area thus enclosed will be thesection cut from the surface by the plane S. If the true size of 96 ESSENTIALS OF DESCRIPTIVE GEOMETRY the… … Fig. 77. 86. Proposition 21. To develop any plane surface. Discussion. Find the true size of each face of the surface andlay these faces out on a plane with their common edges coin-ciding. PLANE SURFACES 97 Construction. In Fig. 78 is shown a hood such as might beused over a forge. To make a…
Geometry, Descriptive
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