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4 June, 20:27

What is the smallest degree of rotation that will map a regular 18-gon onto itself?

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  1. 4 June, 20:52
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    Because the 18-gon is symmetrical, you can rotate it by 360/18 or 20 degrees. This is because when you rotate it by 20 degrees (to the left for explanation matters), any angle will now be in the position of its angle to its left.
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