Question

The three angles of a quadrilateral are equal. If the measure of the fourth and
120°, what is the measure of each of the equal angles ?
​

Answer 1

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

Let x be one the three equal angles.

Sum of all the angles of a quadrilateral = 360°

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

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Answer 2

SOLUTION

Given,

Three angles of a Quadrilateral are equal

& fourth angle = 120°

We know that sum of Quadrilateral= 360°

A/q

=) x+x+x+ 120° = 360°

=) 3x+120° = 360°

=) 3x= 360°-120°

=) 3x= 240°

=) x= 240/3

=) x= 80°

Now,

Three angles are 80°

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