Question

3
Three angles of a quadrilateral are equal
and its fourth angle is 120°. Find all the
angles.​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Let x be one the three equal angles.

Sum of all the angles of a quadrilateral = 360°

⇒ x + x + x + 120° = 360°

⇒ 3x = 360° -120°

⇒ 3x = 240°

⇒ x = 80°

Thus, the measure of each of the equal angle is 80°·

Step-by-step explanation: