Anthony, Gardner Chace, 1856- (from old catalog), Ashley, George Francis, (from old catalog) joint author · Boston, D. C. Heath & co. · leaf 76
t of the angle between planes Nand i^, or its supplement. 86. Case 2. When it is required to deter-mine the angle between an inclined plane andeither coordinate plane. Construction. Figs. 133 and 134. Letit be required to determine the true size ofthe angle between planes iVand H. Pass theauxiliary… … 60 DESCRIPTIVE GEOMETRY 87. To determine the bevels for the correctcuts, the lengths of hip and jack rafters, andthe bevels for the purlins for a hip roof. Fig. 135 represents an elevation and planof a common type of hip roof having a pitch equal to -—- and a width of ch. ah is the center line of…
Geometry, Descriptive
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