Respuesta :
If the trianles are congruent, the sum of three either angles would be equal to 180
so, 87+56+c = 180
c = 180-143
c = 37
SO OPTION C IS YOUR ANSWER....
If the trianles are congruent, the sum of three either angles would be equal to 180
so, 87+56+c = 180
c = 180-143
c = 37
SO OPTION C IS YOUR ANSWER....