Question

angles 1 and 2 are what angle pair? complementary acute adjacent vertical

Explanation:

Step1: Recall angle pair definitions

Complementary angles sum to \(90^{\circ}\). Acute refers to angle measure (\(< 90^{\circ}\), not a pair). Adjacent angles share a common side and vertex. Vertical angles are opposite each other when two lines intersect.

Step2: Analyze angles 1 and 2

Angles 1 and 2 share a common side and vertex.

Answer:

Adjacent