Respuesta :
					                   39 degrees is the measure of the 3rd. Hope I helped. :) Please click thanks.  :)
					                
					                
					             
					                   The measurement for the third angle is 39 because I added the two degrees and got 141 and I know that the total of the degrees is 180. So I subtracted 141 from 180 and got 39
.
					                
					             .
 
			                  