Question

fluency

1. two angles that have a common vertex and rays that point in opposite directions are called

(1) complementary (3) vertical
(2) supplementary (4) adjacent

1. two angles whose measures sum to 90° are called

(1) complementary (3) vertical
(2) supplementary (4) adjacent

1. supplementary angles are two angles whose measures

(1) are equal (3) add up to 180°
(2) add up to 90° (4) are unequal

Explanation:

1. Vertical angles have a common vertex and rays in opposite directions.
2. Complementary angles sum to 90°.
3. Supplementary angles sum to 180°.

Answer:

1. (3) vertical
2. (1) complementary
3. (3) add up to 180°