Krishna
0

Step 1: Recall exterior Angle Theorem

           NOTE: The measure of an exterior angle of a triangle equals the sum of the

            two remote interior angle measures.

            

Step 2: Find the remote interior angle of the triangle

            NOTE: Angles opposite to the exterior angle


Step 3:  Add the two remote interior angle measures. to find the exterior angle measure

          EXAMPLE: \angle 1 = 54 + 76

                               \angle 1  = 130