9
30
This figure is a regular 12-sided polygon. Find m<4
30
The polygon is a Quadrilateral.
A polygon so described is called a regular polygon. You'll find a link below.
15
15
30
This figure is a regular 12-sided polygon. Find m<4
30
9
11
8
This figure is a regular 12-sided polygon. Find m<4
360/exterior angle = number of sides of a regular polygon
The polygon is a Quadrilateral.
I assume you mean a polygon inscribed in a circle. It is regular if all its sides and angles are equal.