An introductory account of certain modern ideas and methods in plane analytical geometry (1894)
Scott, Charlotte Angas, b. 1858 · London, New York : Macmillan and Co. · leaf 205
is a straiglit line. In a diagram the linein each plane that represents infinity in the other plane isof importance. … Fig. 42. From the reciprocal nature of the two figures in Fig. 42,it is seen that parallel lines project into a pencil of lines.In (jider to project a pencil of lines into parallel lines, thecutting plane must be parallel to VP: and to project asecond pencil of lines with vertex Q into parallel…
Geometry, Analytic -- Plane
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