Two adjacent angles of a parallelogram have equal measure. Find the measure of each of the angles of the parallelogram

We know,

Sum of adjacent angles = 180°

∠A + ∠B = 180^{o}

2∠A = 180^{o} (∠A = ∠B)

∠A = 90^{o}

∠B = ∠A = 90^{o}

∠C = ∠A = 90^{o} (Opposite angles of parallelogram)

∠D = ∠B = 90^{o} (Opposite angles of parallelogram)

Hence, each angle of the parallelogram measures 90^{o}

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