Respuesta :

sarkhan2018
It is a pentagon. The sum of all angles of pentagon is 540°.

A) [tex](x+10)+(2x-10)+(x-25)+(x+20)+(x-13)=540[/tex]
    [tex]x=93[/tex]

B) x+20 = 93+20 = 113°. The adjacent exterior angle is 180 - 113 = 67°