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 431
re conveniently placed. PliOBLEM 167. From hvo given lines that intersect each other, to determinethe angle between them. Fig. 208. Let ah and he be the two given lines. Find the inclination of ah, asaT>; also the elevation of he (Prob.161). Find on he a point correspond-ing to the index of a,… … Fig. 208. HORIZONTAL PROJECTION 411 With a as centre, and. radius oB, draw an arc. With d ascentre, and radius (/B, draw another arc till it meets the arcfrom B in B. Join B to a and d. Then a^d is the anglerequired. W^e have obtained the true lengths of three sides ofa triangle abd; aB being the…
Geometrical drawing
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