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 311
60°, although the angle they form withthe Y.P. will vary with each position. The height of the pointB is of course constant for each position. From this we knowthat any line equal to AB in length, and terminated by thelines XY and a line parallel to it drawn through B, as FG-, mustform an angle of… … Fig. 94. with the V.P. This is illustrated in the second part of Figs.93 and 94. Problem 73. To determine the 23}ojections of a line 7 long, making an angle of50° with the H.P. and 30° ivith the V.P. Scale \full size.Pig. 95. Draw XY; and at any point A draw a line Ah, 7 long, atan angle of 50° to…
Geometrical drawing
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