Question

Two angles of a quadrilateral are 89°and113° if the other to angles are equal, find the equal angles

Answer 1

89+113+x+x= 360

Sum of angles in a quadrilateral is 360 degree

202+2x=360

2x=360-202

2x=158

x=158/2

x=79

Answer 2

Sum of all angles of a quadrilateral = 360 °

Let the unknown equal angles be x °.

So , ⇒89 + 113 + x + x = 360

⇒2x = 360 - 202

⇒x = 158/2 = 79°

∴The equal unknown angles are 79 °