Question

7, Three angles of a quadrilateral are equal and the measure of the fourth and is 120
the measure of each of the equal angles.​

Answer 1

Answer:

x+x+x+120 = 360

3x + 120 = 360

3x = 360 - 120

3x = 240

x = 240/3

x = 80

Answer 2

Answer:

80° each

Step-by-step explanation:

the sum of all angles of a quadrilateral is 360°

since the fourth angle is 120°

u subtract the fourth angle from the sum and divide the result by 3