15
If the polygon is a regular polygon then all interior angels are equal to 180-(360/no of sides of the polygon)
It will have 10 equal sides
you find the perimeter and then you times all the sides together
-4
9
30
15
15
This figure is a regular 12-sided polygon. Find m<4
30
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.