Phillips, Andrew Wheeler, 1844- [from old catalog] · [New York, Press of J. J. Little & co.] · leaf 11
may be made on any scale whatever. One very convenientarrangement is to make the angle 45° and draw the lines so inclinedon a scale of one-half. Fig. 12 is an example of what is called isometric projection. Inthis system it is assumed that the projection of a cube is made by ashadow cast on a plane… … laid off for any figure are thevertical lines, the lines perpendic-ular to some fixed vertical plane,and the lines parallel to horizon-tal lines in that vertical plane.The scale of all these lines isthe same, and they are laid offrespectively parallel to O B, O A,and O C in the figure. Theangles A…
Geometry
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