Higbee, F. G · New York, John Wiley & Sons · leaf 137
30. To develop any given cone. Discussion. Draw lines from a common point — the apex —equal in length to the elements of the cone, and spaced accordingto their distances apart on some curve of the surface. 126 ESSENTIALS OF DESCRIPTIVE GEOMETRY Construction. When the given cone is a right circular… … Fig. 104. ■equal in length; therefore, with o as a center and ol as a radius describe the arc i 16, etc., and at any convenient point draw the line ogi equal to ogi. This line will be thefirst element in the development. Now divide the circle of thebase into a convenient number of parts and step…
Geometry, Descriptive
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