In parallelogram

- Opposite angles are equal

∠A = ∠C and ∠B = ∠D

- Adjacent angles are supplementary

∠A + ∠B = 180°

∠A + ∠D = 180°

∠C + ∠D = 180°

∠B + ∠C = 180°

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Last updated at March 20, 2019 by Teachoo

In parallelogram

- Opposite angles are equal

∠A = ∠C and ∠B = ∠D

- Adjacent angles are supplementary

∠A + ∠B = 180°

∠A + ∠D = 180°

∠C + ∠D = 180°

∠B + ∠C = 180°

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