Question

the three angles of quadrilateral are equal if the measure of the fourth angle is 120 degree what is the measure of each of the equal angles

Answer 1

let the angles be x
x+x+x+ 120°= 360°
3x = 360°-120°
3x= 240°
x=240°÷3
x=80°
therefore,the angles are 80°,80°,80°

Answer 2

80° is the measure of three equal angle