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Figure D is a regular polygon. If D’ is a 20 degree rotation of D and is concurrent to D, what is the smallest number of sides that D could have?

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Answer:

18

Step-by-step explanation:

I've never heard of concurrent polygons. I'm assuming that by rotating D by 20°, D keeps its original orientation. Therefore, an exterior angle of D is 20°.

number of sides = 360°/20° = 18

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