1. Unit 4A – Geometric Figures Complementary and Supplementary Angles
Unit 4 Geometry
Unit 4A – Geometric Figures
Lesson 2
Complementary and Supplementary Angles

2. Lesson 2: Complementary and Supplementary Angles
Objective: Swabt identify complementary and supplementary angles. Do Now: Quick Check

3. Lesson 2: Complementary and Supplementary Angles
Definitions Complementary Angles are two angles whose sum is 90°. Supplementary Angles are two angles whose sum is 180°.

4. Lesson 2: Complementary and Supplementary Angles
Identify as complementary or supplementary.
A b.
B C R S T

5. Lesson 2: Complementary and Supplementary Angles
Find the value of x.
2x 28
Since the angles are complementary then 2x = 90
Solve for x:
What is the measure of each angle?

6. Lesson 2: Complementary and Supplementary Angles
Find the value of x.
123° 3x
Since the adjacent angles form a straight line then
3x = 180
Solve for x:
What is the measure of each angle?

7. Classwork Guided Practice #1 – 4 Independent Practice #1 – 10
Problem Solving Practice #1 - 6

8. Closure
Question: How many degrees are complementary and supplementary angles?
Exit Ticket
Homework: Practice #1 - 13

9. Exit Ticket
Angle 1 and Angle 2 are complementary. If Angle 1 is 48° and Angle 2 is 3x, find the value of x.

10. Homework