Penrose triangle
Definition from Wiktionary, the free dictionary
English [edit]
Etymology [edit]
After Roger Penrose (1931-), English mathematician, who popularised it in the 1950s.
Noun [edit]
Penrose triangle (plural Penrose triangles)
- 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.
