Question

what is an angle that is supplementary to ∠10?

Explanation:

Step1: Recall the definition of supplementary angles

Supplementary angles are two angles that add up to \(180^{\circ}\). In the given diagram, \(\angle10\) and \(\angle9\) form a linear pair. A linear pair of angles is supplementary. Also, \(\angle10\) and \(\angle12\) can be considered (if we assume the lines are straight and form a linear - like relationship in the intersection).

Answer:

\(\angle9\) (or \(\angle12\))