Optical Illusions

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Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the lines are the same distance apart. You may need to measure to be sure of your conclusion.

Keywords

geometry, optical illusion, measurement, measure, lines, lengths, illusions

Galleries

Visual Illusions

Source

C. A. Hart & Daniel D. Feldman Plane And Solid Geometry (New York: American Book Company, 1911) 21

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