Question

three angles of a quadrilateral are equal and fourth one is 120 degree.what is the measure of each of the equal angle​

Answer 1

Answer: 80°

Step-by-step explanation:

Let the 3 equal angles be X each.

X+X+X+120 = 360

3X+120 = 360

3X = 240

X = 80=

Answer 2

Answer:

Step-by-step explanation:

Let the three equal angles be x

Sum of all angles of a quadrilateral=360°

So,

x+x+x+120=360

3x+120=360

3x=360-120

3x=240

x=240/3

x=80

Equal angles is of 80°