Question

Three angles of a quadrilateral are equal and the measure of the fourth angle is 120°. Find the measure of each of the equal angles.

Answer 1

let the equal angles be x

x + x + x + 120° = 360° [ ASP of quadrilaterals]
3x + 120 = 360
3x = 360 - 120
3x = 240
x = 240 / 3
x = 80°

Therefore each of the equal angles are 80°

Answer 2

❤️HEY MATE ❤️

We know that sum of the angles of quadrilateral is 360

Given:

Three angles are equal

Fourth angle=120

SOLUTION :

Let the unknown angle be x

Hence, the three angles are x

So,

x + x + x +120 =360

3x +120=360

3x =360-120

3x=240

x=240/3=80

Hence, the measure of equal angles is 80