The 12°-84°-84° triangle can be decomposed into seven smaller isosceles triangles with base angles 12°, 24°, 36°, 48°, 60°, 72°, and 84°, all with the same length legs (the red segments).pic.twitter.com/yEJDQn7hvU
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Here some are! They're related to nonperiodic quasicrystals, arising from projecting higher-dimensional hypercubes into the plane. Symmetric projections make rhombi, while lower symmetry forms parallelograms. https://en.wikipedia.org/wiki/Rhombille_tiling … https://en.wikipedia.org/wiki/Penrose_tiling … https://en.wikipedia.org/wiki/Ammann-Beenker_tiling …pic.twitter.com/MwlmYmUVBW
So which of these is the 4-88-88 triangle, then?
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