What is the interior-angle sum of a 7-sided polygon?

Question: What is the interior-angle sum of a 7-sided polygon?

  1. 901°
  2. 899°
  3. 902°
  4. 900°

Correct Answer: D — 900°

Explanation: The interior-angle sum of an n-sided polygon is (n − 2) × 180°.
Using the values in this question gives 900° as the correct answer.

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