Question

1 multiple answer 1 point 1 2 adjacent vertical complementary supplementary linear pair

Explanation:

Step1: Define adjacent angles

Adjacent angles share a common side and a common vertex. Angles 1 and 2 share a common side and a common vertex.

Step2: Define vertical angles

Vertical angles are opposite each other when two lines intersect. Angles 1 and 2 are not vertical angles.

Step3: Define complementary angles

Complementary angles add up to 90°. There is no indication that ∠1 + ∠2=90°.

Step4: Define supplementary angles

Supplementary angles add up to 180°. Since angles 1 and 2 form a straight - line, ∠1+∠2 = 180°.

Step5: Define linear pair

A linear pair is a pair of adjacent angles whose non - common sides are opposite rays. Angles 1 and 2 are a linear pair.

Answer:

A. adjacent
D. supplementary
E. linear pair