What Is The Formula For Interior And Exterior Angles. In the diagram above if b and a are the intercepted arcs then the measure of the interior angle x is equal to the half the sum of intercepted arcs. To find the interior angle we need to substitute an 8 into the formula since we are dealing with an octagon.
In this video I will take you through everything you need to know in order to answer basic questions about the angles of polygons. An exterior angle of a circle is an angle whose vertex is outside a circle and the sides of the angle are secants or tangents of the circle. The sum of all the internal angles of a simple polygon is 180 n 2 where n is the number of sides.
To find the interior angle we need to substitute an 8 into the formula since we are dealing with an octagon.
Formula to find the Interior angle. The formula for calculating the size of an interior angle is. The sum of the measures of the interior angles of a polygon with n sides is n 2180. Here is an octagon eight sides eight interior angles.
