Chapter 8: Quadrilaterals

Q1. In a parallelogram ABCD, if ∠A = 70°, find ∠B, ∠C, ∠D.

Solution

∠A + ∠B = 180° (adjacent angles supplementary)
∠B = 110°
∠C = ∠A = 70°
∠D = ∠B = 110°