Question

which angle is vertical to ∠aeb?

Explanation:

Step1: Recall vertical - angle definition

Vertical angles are formed when two lines intersect. They are opposite each other and have equal measures.

Step2: Identify vertical angle to ∠AEB

When lines AB and CD intersect at point E, the angle opposite to ∠AEB is ∠DEC.

Answer:

∠DEC