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Shailesh S.

asked • 05/29/18

In a quadrilateral, 2 opposite sides are parallel and are 57 and 55 mm.

In a quadrilateral, 2 opposite sides are parallel and are 57 and 55 mm. One of the remaining side is 12 mm and makes 30 degrees to the horizontal, and another is 11 mm and makes 20 degrees to the horizontal. What is the angle made by parallel sides to the horizontal.

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