HELP!! 2. in the figure, x is an exterior angle to the triangle below. 
a) explain why x is equal to the sum of the measures of the two nonadjacent interior angles. You need to present the equation with the steps/work that proves this theorem. 
Step 1: __ Step 2: __ Step 3: __ 
(b) what is the measurement of < x ?
                                             
                                          
                                          
                                        
											