ABCD is a parallelogram in which ∠A = 70°. Compute ∠B, ∠C and ∠D.

Let one of the adjacent angle ∠A = 70°

Therfore other adjacent angle ∠B = x°

Sum of adjacent angles = 180°

∠B =

∠A = ∠C = 70° and ∠D = ∠B =110° [Measure of opposite angles of a parallelogram are equal]