Question

which angle is complementary to \\( \angle dfe \\)?

Explanation:

Step1: Recall the definition of complementary angles

Complementary angles are two angles whose sum is \(90^{\circ}\).

Step2: Analyze the given figure

Since \(\angle DFE+\angle EFA = 90^{\circ}\) (as the right - angle is formed at \(F\) and \(\angle DFC\) and \(\angle BFC\) are a linear pair with \(\angle BFC = 90^{\circ}\), and using vertical - angle and angle - addition properties).

Answer:

\(\angle EFA\)