31.++Triangle+Exterior+Angle+Theorem-Exterior+Angle+Sum+Theorem

The Triangle Exterior Angle Theorem, as well as the Exterior Angle Sum Theorem can be an instrumental tool when searching for a missing angle measure. By looking at the definitions and demonstrations below, followed by brief practice, you should be able to grasp the concept of both theorems.


 * //Triangle Exterior Angle Theorem//**: states that the measure of an exterior angle of a triangle is equal to the sum of the measures of the two nonadjacent (or remote) interior angles


 * //Exterior Angle Sum Theorem//**: states that the sum of the measures of the exterior angles of a triangle, one angle at each vertex, is 360 degrees

m<2=120 degrees
=**Part 4: Online Web Links:**= [|The Triangle Exterior Angle Theorem] [|The Triangle Exterior Angle Theorem] [|The Exterior Angle Sum Theorem]