Question

the three angles of a quadrilateral are equal and the measure of forth angle is 120° . find the measure of each of the equal angles​

Answer 1

Answer:

80°

Step-by-step explanation:

Let the equal angles be x.

We know that sum of all angles of a quadrilateral is 360°.

So,

x + x + x + 120 = 360°

3x = 240°

x = 240/3

x = 80°

The measure of each of the equal angles is 80°

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