Complementary and Supplementary Angles Lesson and Practice

The video tutorial covers the concepts of complementary and supplementary angles, explaining their definitions and differences. Complementary angles sum to 90 degrees, while supplementary angles sum to 180 degrees. The tutorial provides examples of both types, including separate and adjacent angles. It also includes practice problems for classifying angles and solving equations to find missing angle measures. The video emphasizes remembering the alphabetical order of 'C' for complementary (90 degrees) and 'S' for supplementary (180 degrees) to help differentiate between them.

What is the sum of two complementary angles?

• 45 degrees

• 90 degrees

• 180 degrees

• 360 degrees

If two angles add up to 180 degrees, what are they called?

• Complementary

• Supplementary

• Neither

• Adjacent

Which of the following pairs of angles are neither complementary nor supplementary?

• 41 and 49

• 70 and 19

• 70 and 110

• 44 and 136

If 4x + 36 equals 90, what is the value of x?

• 12

• 13.5

• 15

• 18

In the equation 4x + 5 + 41 = 180, what is the value of x?

• 31.5

• 35

• 30

• 33.5

What is the value of x if 3x + 45 equals 90?

• 15

• 10

• 18

• 12

Which of the following is a characteristic of supplementary angles?

• They are always equal

• They add up to 180 degrees

• They are always adjacent

• They add up to 90 degrees