Question

Three Angle Of A Quadrilateral Are Equal And The Measure Of The Fourth Angle 120°. Find The Measure Of Each Of The Equal Angle ?

Solve

Answer 1

let the angles be x, x, x because all are equal.

angle sum property of a quadrilateral is 360, so

x+x+x+120=360

3x+120=360

3x=360 - 120

3x=240

x = 240/3

x=80

therefore all the three angle are 80 degrees

Answer 2

Answer:

80

Step-by-step explanation:

let the equal angle be x

by given data.

$x \: + x + x + 120 = 360 \\ = 3x + 120 = 360 \\ = 3(x + 40) = 360 \\ = x + 40 = 120 \\ = x = 120 - 40 \\ = x = 80$

hence the answer is 80