Two angles of a quadrilateral are 60°° 170° and other two angles are equal. find angles?
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Let the measure of the fourth angle be x°.
We know that the sum of the angles of a quadrilateral is 360°.
Therefore, 54 + 80 + 116 + x = 360
⇒ 250 + x = 360
⇒ x = (360 - 250) = 110.
Hence, the measure of the fourth angle is 110°.
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