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The interior angles of an x-sided polygon would be: (x - 2) * 180.

(20 - 2) * 180 = 3,240

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Q: What is the sum of the interior angles of a regular 20-sided polygon?
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How many side does a regular polygon have with an interior angle of 30?

The smallest regular polygon, an equilateral triangle, has interior angles of 60. A square has interior angles of 90. There can't exist a regular polygon with interior angles of 30.


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