Question

In the given figure, ABCD is a parallelogram in which angle A=70°.Calculate angle B ,angle C and angle D

Answer 1

We know that sum of adjacent angles of a parallelogram is 180°  

∴ ∠A + ∠B = 180°

70 + ∠B = 180°    [∵ ∠A = 70° given]

∴ ∠B = 110°

Also,  

∠A = ∠C = 70°  [Opposite angles of parallelogram are equal]

∠B = ∠D = 110°  [Opposite angles of parallelogram are equal]

Answer 2

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