Rotation of a Triskelion

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Slide the letter t to rotate the black dotted triskelion. In one full turn, how many times will the dotted shape fit exactly on the pink shape? This number of exact fits is called the order of rotational symmetry.

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線性規劃或線性最佳化
代數
三角形
整數
立方（體）

Rotation of a Triskelion

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