Optical Illusions

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Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the lengths of lines a and b are the same. You would 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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