Question

What is the measure of each interior angle of the regular polygon pictured below? If necessary, round to the nearest tenth. the angle has 3 sides.

Answer 1

For a regular n‑gon each interior angle = (n − 2)·180° / n. For n = 3:
(3 − 2)·180° / 3 = 180° / 3 = 60°.
So each interior angle measures 60° (60.0° to the nearest tenth).