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 347
326 SOLID GEOMETRY … Fiff. 141. Problem 109. To project a line making an angle of 40° with the H.P., andcontained hy a given plane. Pig. 141. Let H.T. and V.T. be the traces of the given plane. At any convenient pointA on XY draw AV at therequired angle (40°) till itmeets the V.T. in &. Drawthe perpendicular hh.…
Geometrical drawing
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