Question

other than itself, which angle is congruent to ∠ech?

Explanation:

Step1: Recall vertical angles definition

Vertical angles are formed when two lines intersect. They are opposite each other and congruent.

Step2: Identify vertical angle of ∠ECH

When looking at the intersection of lines \(EH\) and \(FG\) at point \(C\), the angle opposite to \(\angle ECH\) is \(\angle FCG\).

Answer:

\(\angle FCG\)