Respuesta :

jade5018

Answer:

80°

because its diagnol so the one in the top corner is the same as x

sreedevi102

Answer:

x = 140°

Step-by-step explanation:

Sum of exterior angles of polygon is 360°

That is, x + 70 + 80 + 70 = 360

           x + 220 = 360

           x = 360 - 220 = 140°