What Do The Exterior Angles Add Up To. This works because all exterior angles always add up to 360. The exterior angle at a vertex corner of a shape is made by extending a side.
Together the adjacent interior and exterior angles will add to 180 180. The sum of the interior angles of a rectangular pentagon is equal to 540 degrees. It is very easy to calculate the exterior angle it is 180 minus the interior angle.
N n2 180 n2 180 n.
In the figure above drag the triangles vertices and see that this is so. In the case of a regular pentagon the interior angle is equal to 108 and the exterior angle is equal to 72. When we add up the Interior Angle and Exterior Angle we get a straight line 180. 4 Short Steps for answering Exterior Angle of a Triangle Example Problems The three angles in a triangle add up to 180 degrees.
