1. Splash Screen

2. Five-Minute Check (over Chapter 9) Main Idea and Vocabulary
Example 1: Naming Angles
Key Concept: Types of Angles
Example 2: Classify Angles
Example 3: Classify Angles
Key Concept: Vertical Angles and Adjacent Angles
Example 4: Real-World Example
Lesson Menu

3. Angle: has 2 sides that share a common endpoint.
Classify angles and identify vertical and adjacent angles.
Angle: has 2 sides that share a common endpoint.
Degrees: All angles are measured in degrees.
Vertex: The endpoint where the 2 sides of the angle meet (always in the middle).
Adjacent Angles: 2 angles that share a common vertex, common side and do not overlap (remember: they sit next to each other).
Vertical Angles: 2 angles that are opposite angles formed by intersecting lines (remember: they always sit across from each other).
Main Idea/Vocabulary

4. Right Angle: An angle that measures exactly 90 degrees.
Acute Angle: Angles that measure greater than zero degrees and less than 90.
Obtuse Angle: Angles that measure greater than 90 degrees and less than 180.
Right Angle: An angle that measures exactly 90 degrees.
Straight Angle: Angles that measure exactly 180 degrees or make a straight line.
Congruent Angles: 2 angles that have the same measure in degrees.
Main Idea/Vocabulary

5. Name the angle at the right.
Naming Angles
Name the angle at the right.
 Use the vertex as the middle letter and a point from each side. FGH or HGF
 Use the vertex only. G
Use a number. 2
Answer: The angle can be named in four ways: FGH, HGF, G, 2.
Example 1

6. Which of the following is not a name for the angle below?
A. RST
B. T
C. 3
D. S A B C D
Example 1

7. KC 1

8. Classify the angle as acute, obtuse, right, or straight.
Classify Angles
Classify the angle as acute, obtuse, right, or straight.
Answer: The angle is exactly 180°, so it is a straight angle.
Example 2

9. Classify the angle as acute, obtuse, right, or straight.
A. acute
B. obtuse
C. right
D. straight A B C D
Example 2

10. Classify the angle as acute, obtuse, right, or straight.
Classify Angles
Classify the angle as acute, obtuse, right, or straight.
Answer: The angle is less than 90°, so it is an acute angle.
Example 3

11. Classify the angle as acute, obtuse, right, or straight.
A. acute
B. obtuse
C. right
D. straight A B C D
Example 3

12. KC 2

13. Similarly, 4 and 5 are adjacent angles.
Since 3 and 5 are opposite angles formed by the intersection of two lines, they are vertical angles.
Since 3 and 4 share a common side and vertex and do not overlap, they are adjacent angles.
Similarly, 4 and 5 are adjacent angles.
Answer: 3 and 5 are vertical angles. 3 and 4 are adjacent angles. 4 and 5 are adjacent angles.
Example 4

14. For the figure shown, which of the following is true?A. B. C. D. A B C D
Example 4

15. End of the Lesson
End of the Lesson

16. Five-Minute Check (over Chapter 9) Image Bank Math Tools
Tessellations
Translations
Resources

17. How many ways can 7 books be stacked in a single pile?
(over Chapter 9)
There are 12 balls in a hat and 3 are red. What is the probability of drawing a red ball?
Use the Fundamental Counting Principle to find the total number of outcomes when choosing an outfit from 3 pairs of pants, 5 shirts, and 4 jackets.
How many ways can 7 books be stacked in a single pile?
A coin is tossed 14 times. It lands on heads 8 times and on tails 6 times. What is the theoretical probability of landing on tails? What is the experimental probability of the coin landing on tails? A B C D
A number cube is rolled and the spinner shown in the image is spun. What is the probability of rolling an even number and spinning an odd number?
Five Minute Check 1

18. (over Chapter 9)
There are 12 balls in a hat and 3 are red. What is the probability of drawing a red ball? A. B. C. D. A B C D
Five Minute Check 1

19. (over Chapter 9)
Use the Fundamental Counting Principle to find the total number of outcomes when choosing an outfit from 3 pairs of pants, 5 shirts, and 4 jackets.
A. 12
B. 60
C. 80
D. 120 A B C D
Five Minute Check 2

20. How many ways can 7 books be stacked in a single pile?
(over Chapter 9)
How many ways can 7 books be stacked in a single pile?
A. 5,040
B. 49
C. 10,080
D. 4,900 A B C D
Five Minute Check 3

21. (over Chapter 9)
A coin is tossed 14 times. It lands on heads 8 times and on tails 6 times. What is the theoretical probability of landing on tails? What is the experimental probability of the coin landing on tails? A. B. C. D. A B C D
Five Minute Check 4

22. (over Chapter 9)
A number cube is rolled and the spinner shown in the image is spun. What is the probability of rolling an even number and spinning an odd number?
A B.
C D. A B C D
Five Minute Check 5

23. End of Custom Shows