In parallelogram ABCD the length of AB is 8 cm ... - JSS2 Mathematics Plane figures/shapes Question
In parallelogram ABCD, the length of AB is 8 cm and the length of AD is 5 cm. If the measure of ∠A is 70°, find the measure of ∠B, ∠C, and ∠D.
∠A = 70°
Since opposite angles are equal: ∠C = 70°
Consecutive angles are supplementary: ∠B + ∠A = 180°
Therefore, ∠B = 180° - 70° = 110°
∠D = ∠B = 110°
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