Question

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

Answer 1

Given, 

In a parallelogram ABCD, 

∠A =70^∘ 

∠A + ∠B = 180^∘.. (supplementary angles) 

∠B = 180^∘ – 70^∘ = 110^∘ 

∠A = ∠C and 

∠B = ∠D.. (Opposite angles of parallelogram) 

∠A = 70^∘, 

∠B = 110^∘, 

∠C = 70^∘, 

∠D = 110^∘