Question

which angle is complementary to ∠4?

Explanation:

Step1: Recall complementary - angle definition

Two angles are complementary if their sum is 90 degrees. In the case of intersecting lines, we often look for right - angle relationships. If we assume that the intersection of the lines forms right - angles (since no other angle information is given and we are dealing with complementary angles), and we know that adjacent angles that form a right - angle are complementary.

Step2: Identify adjacent angle to ∠4

∠5 is adjacent to ∠4. If the intersection of the lines creates right - angles, then ∠4+∠5 = 90 degrees.

Answer:

∠5