Question

the three angles of a quadrilateral are 65 degree 55 degree 130 degree find its fourth angle

Answer 1

the fourth angle of the quadrilateral is 120 degree

Answer 2

Let the fourth angle be x, 65+55+130+x=360 because the sum of all angles in a quadrilateral is 360. 250+x =360 , x = 360-250. ; x =110. hence the fourth angle is 110 degree