Question

Three angles ofa quadrilateral are equal forth angle is a right angle. Find the measure of the angles
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Answer 1

Let measure of the 3 equal angles be x°.
We know that, sum of all angles of a quadrilateral is 360°.
x+x+x+90°=360°
3x+90°=360°
3x=360°-90°
3x=270°
x=270/3=90°
Therefore, the measure of the 3 equal angles is 90°.
Therefore, it is a square or rectangle.