Q146 of 160 Page 144

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

144

In rectangle READ. Find ∠EAR, ∠ RAD and ∠ROD.

145

In rectangle PAIR. Find ARI. RMI and PMA.

147

In parallelogram PQRS. O is the mid-point of SQ. Find ∠S, ∠R. PQ, Qr and diagonal PR.

148

In rhombus BEAM. Find AME and AEM.