1. Contents Recap the terms Test Yourself - 1 Angles in daily life
Congruent angles
Pairs of angles: Types
What is an angle?
Test Yourself - 2
Naming an angle
Pairs of angles formed by a transversal
Interior and exterior of an angle
Test Yourself - 3
Measurement of angle
Types of angle: Right angle
Obtuse angle
Acute angle
Straight angle

2. ANGLES

3. Right angle: An angle whose measure is 90 degrees.
Obtuse Angle
Acute Angle
Straight Angle

4. Examples Of Right Angle

5. Obtuse angle: An angle whose measure is greater than 90 degrees.
Right Angle
Obtuse Angle
Acute Angle
Straight Angle

6. Examples Of Obtuse Angle

7. Acute angle: An angle whose measure is less than 90 degrees.
Right Angle
Obtuse Angle
Acute Angle
Straight Angle

8. Examples Of Acute Angle

9. Straight angle: An angle whose measure is 180 degrees.
Right Angle
Obtuse Angle
Acute Angle
Straight Angle

10. Examples Of Straight Angle

12. Complementary Angles
Two angles whose sum is 90 degrees. 40 50 30 60

13. Find Missing Angle Measures
Angles M and N are complementary. If m<m = 45 what is the measure of <n?
m<M + m<N = 90
m<N = 90
= -45
m<N = 45

14. Supplementary Angles
Two angles whose sum is 180 degrees.
120 60

15. Find Missing Angle Measures
Angles M and N are supplementary. If m<m = 85 what is the measure of <n?
m<M + m<N = 180
m<N = 180
= -85
m<N = 95

16. Let’s Try Some Examples35 55
110 60
140 30 10 90 20
150 70
162 18

17. Answers C N S

18. Find the missing complementary angle
Angle 1 = 60 degrees
Angle 2 = ________
Angle 1 = 24 degrees
Angle 1 = 48 degrees
Angle 1 = 16 degrees

19. Find the missing supplementary angle
Angle 1 = 160 degrees
Angle 2 = ________
Angle 1 = 63 degrees
Angle 1 = 148 degrees
Angle 1 = 14 degrees