Lange, David C. (David Christoph) · New York : John Wiley & Sons ; London : Chapman & Hall · leaf 91
Fig. 39 Fig. 40 QUESTIONS ON THE SHADOWS OF PLANES 81 Determine the shadows of the plane surfaces (Art. 27)and it will be seen that the shadows have the size and shapeof the plane surfaces casting them. Axiom VI. Any point or line lying on a plane is theInvisible Shadow of itself on that plane. 29.…
Shades and shadows · Geometry, Descriptive
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