How To Find The Measure Of One Interior Angle Of An Octagon. You can do this with any convex polygon and by convex I mean that all the internal angles are less than 180 degrees. 75 times 2 equals 150 degrees.
In this case 6 x 180 1080. What is the size of each interior angle of a 12 sided regular polygon. Sum of Interior Angles of a Polygon with Different Number of Sides.
Where n is the number of sides.
Measure of each interior angle 135 Each interior angle of a regular octagon is 135. Sum of Interior Angles of a Polygon with Different Number of Sides. In a regular polygon each interior angle has the same angle. The sum of interior angles of a regular polygon and irregular polygon examples is given below.