The angle between the diagonal and the side of the rhombus is 20 degrees. Find the corners of the diamond.

Since the diagonal of the rhombus is the bisector of the angle at its apex, the acute angle of the rhombus will be 2 * 20 = 40.

The sum of the adjacent corners of the rhombus is 180, then the obtuse angle is (180 – 40) = 140.



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