Asked by nana

An illustration of a hendecagon with the vertices labeled upper A, upper B, upper C, upper D, upper E, upper F, upper G, upper H, upper I, upper J, and upper K clockwise from the top.
Find the sum of the interior angles of a hendecagon (11-sided polygon).

All Answers 1

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

In radians that is 9π.