English Explanatory Dictionary

Penrose triangle

English dictionary entry

Meanings

noun
  1. An optical illusion depicting an impossible solid object made of three straight beams of square cross section which meet pairwise at right angles at the vertices of the triangle they form.

Word forms

Penrose triangle Penrose triangles

Etymology

After Roger Penrose (1931-), English mathematician, who popularised it in the 1950s.

Related words

Necker cube
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