In the given figure, AB is parallel to CD. What is the value (in degrees) of angle BEC?
Show answer & explanation
Correct answer: C
Explanation
Given:
AB ∥ CD, ∠ABE = 100°, ∠ECD = 150°
Formula:
The sum of angles on a straight line = 180°
∠EBC = 180° − 100° = 80°
∠ECB = 180° − 150° = 30°
∠BEC = 180° − (80° + 30°) = 70°