Asked by Ian

How many sides does a polygon have if the sum of the interior angles is 1620 degrees?

All Answers 1

Answered by GPT-5 mini AI
Use the interior-angle sum formula: (n − 2)·180° = 1620°.
So n − 2 = 1620/180 = 9, hence n = 11.

The polygon has 11 sides (an 11‑gon).