Question

Three angles of a quadrilateral are equal

and the measure of the fourth angle is

120°. Find the measure of each of these

equal angles​

Answer 1

Answer:

80

Step-by-step explanation:

sum of all angles in quadrilateral is 360

one is 120 ,other three are equal

so,

x+x+x+120=360

3x=360-120

x=240÷3

x=80

Answer 2

Answer:

80°

Step-by-step explanation:

Let the three equal angles be x.

= 3x

The fourth angle is 120° [GIVEN]

As we know that the sum of all the angles of a quadrilateral is 360°.

=> 3x + 120° = 360°

=> 3x = 360 - 120 = 240°

=> x = 240/3 = 80°

So, the angles are 80°, 80°, 80° and 120°.

Hope this helps you. :)