Wiktionary英語版

出典：Wiktionary

Penrose triangle

出典:『Wiktionary』 (2026/05/01 23:20 UTC 版)

語源

Named after English mathematician Roger Penrose (1931–) who popularised it in the 1950s.

名詞

Penrose triangle (plural Penrose triangles)

  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.

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ウィキペディア英語版

出典：Wikipedia

Penrose triangle

出典:『Wikipedia』 (2011/06/15 16:10 UTC 版)

英語による解説

ウィキペディア英語版からの引用
引用

The Penrose triangle, also known as the Penrose tribar, is an impossible object. It was first created by the Swedish artist Oscar Reutersvärd in 1934. The mathematician Roger Penrose independently devised and popularised it in the 1950s, describing it as "impossibility in its purest form". It is featured prominently in the works of artist M. C. Escher, whose earlier depictions of impossible objects partly inspired it.

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