Question

BCDE is a parallelogram.

What is the measure of ∠BEC?

Enter your answer in the box.

Answer 1

80°

Explanation:

∠CBE = 60°

∠BCE = ∠CED = 40°

∠BCE + ∠CBE + ∠BEC = 180° Substitute values

∠BCE + 60° + 40° = 180°

∠BCE + 100° = 180° Subtract 100° from each side

∠BCE = 80°