20.Two angles of a quadrilateral measure 100 and 50°. The other two angles are equal. Find the equal angles.
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Explanation:
Let x be the other angle
Given: measure of two adjacent angles of a quadrilateral are 110∘,50∘.
We know that, Sum of angles of quadrilateral = 360∘
∴x+x+110∘+50∘=360∘
⇒x=100∘
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