Question

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

Answer 1

Answer:

x+x+x+120°=360°

3x+120°=360°

3x=240°

x=80°

and all three angles are 80°

Answer 2

Answer:

Hi friend ⭐♥️❣️

Let each angle in a quadrilateral be x

Concept used : Sum of all angles in a quadrilateral is 360°

$x + x + x + 120 = 360 \\ 3x + 120 = 360 \\ 3x = 240 \\ x = \frac{240}{3} \\ \implies \: x = 80$

Measure of equal angles = 80°

Hope it helps you

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