It is not possible to trust the eye to be sure if the lengths of lines a and b are the same. The need arises to measure to be sure of one's conclusion

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It is not possible to trust the eye to be sure if the lengths of lines a and b are the same. The need arises to measure to be sure of one's conclusion, vintage line drawing or engraving illustration.

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Size: 5000px × 1676px
Photo credit: © Patrick Guenette / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: art, black, drawing, engraved, engraving, geometry, illusion, illusions, illustration, lengths, line, lines, measure, measurement, optical, vector, vectors, vintage, visual, white