Question

measure of three angels of a quadrilateral are 39,141,and13 find fourth

Answer 1

39+141+13+x=360
193+x=360
x=360-193
x=167
Fourth angle is 167

Answer 2

Let the Fourth angle be x
39° +141° +13°+x =360° (Sum of the angles of a quadrilateral is equal to 360° )
x = 360°-193°
x = 167°