Question

find the measure of each interior angle of a regular polygon of 10 side .

Answer 1

Answer =The sum of the exterior angles taken one at each vertex of a convex polygon is 360 degrees. If the polygon has 10 sides and is regular then all of the exterior angles are the same so each one is 360 / 10 = 36 degrees.  I hope that this answer help you  

Answer 2

Interior angles of a polygon = 180(n-2)
180(10-2)
180×8
1440°