In the given figure, AB is parallel to CD. PQ = QR. Angle BQS = 80 degrees. What is the value (in degrees) of angle RQB?
Show answer & explanation
Correct answer: B
Explanation
Given:
AB ∥ CD
PQ = QR
∠BQS = 80°
Vertically opposite angles are equal.
Alternate interior angles formed by parallel lines are equal.
∠BQS = 80° ⇒ ∠RQB = 80° (Vertically opposite angles)