Descriptive geometry for students in engineering science and architecture; a carefully graded course of instruction (1915)
Armstrong, Henry F. (Henry Fry), 1868- · New York, J. Wiley & sons, inc.; [etc., etc.] · leaf 98
dicularly to the V.P. for greater convenience. The line AB, shown in PROJECTION OF SOLIDS DEPENDENT ON TANGENT PLANES 89 plan at ab and in elevation at ab, is an edge of the cube perpendicular to the 40face and therefore may serve as an edge of the 70° face. The 70° plane, to include this edge of… … Fig. 91. The point A is common to both planes, the 40° and the 70°; so, also, is thepoint // where the two planes H.T.s meet. Join // to a therefore, and so obtainthe plan of the intersection of the 40° plane with the 70° plane. This line will con-tain the edge of the cube common to the two faces…
Geometry, Descriptive
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