Q. 1465.0( 4 Votes )
In parallelogram ABCD, find∠ B, ∠C and ∠D.
Given, ∠A = 80
⟹The sum of the adjacent angles of a parallelogram is 180
Hence, ∠A + ∠B = 180
∠B = 180-80
∠B = 100
⟹The opposite angles of a parallelogram are equal.
Hence, ∠C = ∠A = 80
And, ∠D = ∠B = 100
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