File:Polygon fig2 gruenbaum.png

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This polygon looks like an equilateral triangle, but is in fact a quadrangle with two coinciding vertices.

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Description
English: Fig. 2.This polygon looks like an equilateral triangle, but is in fact a quadrangle with two coinciding vertices. Besides the identity, the only symmetry it admits is a reflection (in a vertical mirror through the coinciding vertices 3 and 4) paired with the permutation (12)(34).
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Author Tomruen

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current03:32, 7 March 2021Thumbnail for version as of 03:32, 7 March 2021623 × 641 (24 KB)Tomruen (talk | contribs)Uploaded own work with UploadWizard

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