Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 337
Problem 98. To determine the angle hetween tivo planes N and 0, hoth of xohichare inclined to the H.P. and V.P., vnth their V. tracesparcdlel to each other, their traces heing given. Pig. 128. Let IsT and N, 0 and 0, be the traces of the two planes ISTand 0, meeting in a. At a, which may be any… … Fis. 128. Join cd, then dcb is the With a as centre, andradius ae, draw an arctill it meets the H.T. ofplane N in /. From cset off on XY eg equalto ef, and draw gV parallelto cd. From c draw cliperpendicular to gV.From e on ef set off ekequal to cli. Join ha.Then eah is the anglerequired. Problem…
Geometrical drawing
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