Two adjacent angles of a parallelogram have equal measure. Find the measure of each of the angles of the parallelogram.
Sum of adjacent angles = 180°
∠ A + ∠ B = 180º
2∠ A = 180º (∠ A = ∠ B)
∠ A = 90º
∠ B = ∠ A = 90º
∠ C = ∠ A = 90º (Opposite angles)
∠ D = ∠ B = 90º (Opposite angles)
Thus, each angle of the parallelogram measures 90º.
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