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

Question

ABCD is a parallelogram in which &#x2220; A = 70&#xB0;. Compute &#x2220; B , &#x2220; C and &#x2220; D .

Philoid · Accepted Answer

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]