Question

How to find the interior angle of a regular polygon with 18 sides.

Answer 1

Answer:

Interior angle = 160°

Step-by-step explanation:

the sum of the exterior angles is ALWAYS 360°

So you can find the size of the exterior angles of a regular polygon quite easily:

If there are 18 sides (n=18), then each exterior angle is:

$\frac{360}{n}$ = $\frac{360}{18}$ = 20°

∴ Each interior angle is   180° - 20° = 160°