The angle between two altitudes of a parallelogram through the same vertex of an obtuse angle of the parallelogram is 60 degree find the angels of the parallelogram .
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Suppose PQRS is a parallelogram in which ∠S is obtuse. Through the vertex S altitudes, ST and SU are drawn. Hence, angles of the parallelogram are 120°, 60°, 120° and 60°..
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