The Penrose triangle is a two-dimensional shape that cannot be depicted three-dimensionally. It was first created by the Swedish artist Oscar Reutersvärd in 1934. Independently from Reutersvärd, the triangle was devised and popularized in the 1950s by psychiatrist Lionel Penrose and his son, prominent mathematician Roger Penrose, who described 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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Follow along with the video tutorials and learn how to draw a Penrose triangle and oval. :)

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