Question

2 angles of a quadrilateral are 55 degree and 75 degree and other two angles are equal . what is the measures of equal angles.

Answer 1

Let the 2 equal angles be x.
According to question.

2x + 55 + 75 = 360 ( sum of all the angles of
quad. is 360 )
2x + 130 = 360

2x =360 - 130

2x= 230

x = 230 ÷ 2
x = 115 degree