Question

1. Vertical angles are complementary

2. Vertical angles are adjacent

3. The complement of an acute angle is an acute angle

4. The supplement of an obtuse angle is an obtuse angle

Answer the following questions with Always, sometimes, or never

Answer 1

• 1. Sometimes, 2. Never, 3. Always, 4. Never

Explanation:

1. Vertical angles are complementary

• Sometimes (if measure45°)

2. Vertical angles are adjacent

• Never

3. The complement of an acute angle is an acute angle

• Always. Both of them < 90°

4. The supplement of an obtuse angle is an obtuse angle

• Never. Obtuse angle > 90°, supplement is (180° - obtuse), which is <90° so is acute