If ∠A and ∠B are two adjacent angles of a parallelogram. If ∠A = 70°, then ∠B = ?
Answer & explanation
Correct answer: option 3
The adjacent angles of a parallelogram are supplementary (property of parallelogram).
∠A + ∠B = 180°
70° + ∠B = 180°
∠B = 180 – 70° = 110°