Lange, David C. (David Christoph) · New York : John Wiley & Sons ; London : Chapman & Hall · leaf 90
34.) Case IV. When the plane surface is perpendicular toone of the coordinates and the shadow falls on that coordi-nnate. (Fig. 35.) Case V. When the shadow of any plane surface fallson any oblique plane. (Fig. 36.) 28. The shadow of a plane surface on another planesurface to which it is parallel,… … al yi
Shades and shadows · Geometry, Descriptive
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