Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 171
the upper surface of the H.P. with thefront of the V.P. is called the first dihedral angle, viz. A, fig. 287. The angle formed by the upper surface of the H.P. with theback of the V.P. is called the second dihedral angle, viz. B, fig. 287. The angle formed by the under surface of the H.P. with… … 158 GEOMETRICAL DRAWING AND DESIGN.
Geometrical drawing · Design · Drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
