Question

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

Answer 1

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Answer 2

Answer:

Step-by-step explanation:

Let the value of three angle be x.

w.k.t., sum of angles of a quadrilateral is 180°.

⇒ x+x+x+120° = 360°

or 3x+120° = 360°

or 3x = 360°-120° = 240°

or x = 240°/3

or x = 80°

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