1. Concept

2. Find Measures of Central Angles
Find the value of x.
Example 1

3. The sum of the measures of
Find Measures of Central Angles
The sum of the measures of
Substitution
Simplify.
Add 2 to each side.
Divide each side by 26.
Answer: x = 7
Example 1

4. Find the value of x.
A. 9
B. 10
C. 11
D. 65
Example 1

5. Concept

6. Classify Arcs and Find Arc Measures
Answer:
Example 2

7. Classify Arcs and Find Arc Measures
Example 2

8. Classify Arcs and Find Arc Measures
Answer:
Example 2

9. Classify Arcs and Find Arc Measures
Answer:
Example 2

10. Concept

11. mLPK = 0.21(360) Find 21% of 360. = 75.6 Simplify. Answer:
Find Arc Measures in Circle Graphs
mLPK = 0.21(360) Find 21% of 360.
= 75.6 Simplify.
Answer:
Example 3

12. Find Arc Measures in Circle Graphs
Example 3

13. Sum of arcs in a circle is 360.
Find Arc Measures in Circle Graphs
Sum of arcs in a circle is 360.
Substitution
Simplify.
Simplify.
Answer:
Example 3

14. Concept

15. Use Arc Addition to Find Measures of Arcs.
Example 4

16. Arc Addition Postulate
Use Arc Addition to Find Measures of Arcs
Arc Addition Postulate =
Substitution
= 90
Answer:
Example 4

17. Use Arc Addition to Find Measures of Arcs
Example 4

18. Arc Addition Postulate
Use Arc Addition to Find Measures of Arcs
Arc Addition Postulate
= mIMJ + mJMK =
Substitution
= 148
Answer:
Example 4

19. Concept

20. Arc Length Equation Substitution cm Use a calculator. Answer:
Find Arc Length
Arc Length Equation
Substitution
Use a calculator. cm
Answer:
Example 5

21. Arc Length Equation Substitution Use a calculator. Answer:
Find Arc Length
Arc Length Equation
Substitution
Use a calculator.
Answer:
Example 5

22. Arc Length Equation Substitution Use a calculator. Answer:
Find Arc Length
Arc Length Equation
Substitution
Use a calculator.
Answer:
Example 5