Find the value of x. then find the measures of the polygon.

(x - 3) + (x +8) + (x - 5 ) + x = 360
x + x + x + x - 3 + 8 - 5 = 360
4x + 0 = 360
4x = 360
x = 360 / 4
x = 90

Measures of the polygon -
=180 - 90
=90
=360/90
=4