1. Complementary and Supplementary Angles
Lesson 2.2
Complementary and Supplementary Angles
Objective:
Recognize complementary and supplementary angles

2. Definition: Complementary angles are two angles whose sum is (a right angle)
Each of the two angles is called the complement of the other.
Draw two examples of complementary angles.

3. Which two angles are complementary?62 A 32 B 28 C

4. Find the complement of a 59° 34’ 13’’ angle.
is complementary to If how large is ?
Find the complement of a 59° 34’ 13’’ angle.

5. Definition: Supplementary angles are two angles whose sum is (a straight angle).
Each of the two angles is called the supplement of the other.
Draw two examples of supplementary angles.

6. What is the supplement of a angle?
Given: Diagram as shown
Prove: <1 is supp. to <2.
(Hint: This proof takes more than two steps.) 1 2 A B C

7. Given: <TVK is a right angle. Prove: <1 is comp. to <2.X 1 2 V K

8. Steps to Solving Word Problems
1. Read the entire problem
2. Draw a picture or diagram
3. Write down the information given
4. Determine what information is missing
5. Plan how to solve for the missing information
6. Solve for the missing information
7. Make sure that your answer is appropriate and answers any questions presented

9. The measure of one of two complementary angles is three greater than twice the measure of the other. Find the measure of each.
The measure of the supplement of an angle is 60 less than 3 times the measure of the complement of the angle. Find the measure of the complement

10. Explain how you would find a supplement and a complement.
Summary…
Explain how you would find a supplement and a complement.
Homework
Lesson 2.2 Worksheet