Shadow of an Ladder
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“A ladder leaning against a wall casts it shadow partly on the wall C; it is continued on an open door not perpendicular with its connecting wall; and lastly upon the ground. Project also the shadow of the door. Let A be the source of light” (Britannica, 1891)
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General Geometric IllustrationsSource
Benson John Lossing, ed. The New Popular Educator (London, England: Cassell & Company Limited, 1891)
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