Practice Masters Level A 9.1 Chords and Arcs - Hyman
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Practice Masters Level A
9.1 Chords and Arcs
Copyright ? by Holt, Rinehart and Winston. All rights reserved.
Use the figure of M below for Exercises 1=3.
A BC
D
M
1. Name three radii of the circle. 2. Name a diameter of the circle. 3. Name a chord of the circle.
Use the figure of P below for Exercises 4=7.
F
G
P
4. List three major arcs of the circle. 5. List three minor arcs of the circle. 6. If mFHG 61?, what is mFPG?
7. If mFPG 96?, what is mFHG?
H
Determine the length of the arc with the given central angle measure, mW , in a circle with radius r. Round your answers to the nearest hundredth.
8. mW 45?; r 5
9. mW 90?; r 10
10. mW 60?; r 8
11. mW 120?; r 20
12. mW 76?; r 5.2
13. mW 196?; r 12
Determine the degree measure of an arc with the given length, L, in a circle with radius r. Round your answers to the nearest whole degree.
14. L 10; r 7
15. L 14; r 20
16. L 25; r 12
17. L 36; r 18
18. L 7; r 13
19. L 4.2; r 6
For Exercises 20=23, find the degree measures of each arc by using the central angle measures given in M.
20. mAC
21. mDF
22. mA DC
23. mF BC
AB
30
70
M 80
C
20
FD
166
Practice Masters Levels A, B, and C
Geometry
Menu PrAinnt swers
Lesson 9.1 Level A
1. MA, MB, MD 2. DB 3. AB
4. H FG, F GH, G HF
5. HF, FG, GH 6. 122? 7. 48? 8. 3.93 9. 15.70 10. 8.38 11. 41.89 12. 6.90 13. 41.05 14. 82? 15. 40? 16. 119? 17. 115? 18. 31? 19. 40? 20. 100? 21. 20? 22. 260? 23. 260?
Lesson 9.1 Level B
1. 154? 2. 86?
306
Practice Masters Levels A, B, and C
3. 240? 4. 170? 5. 206? 6. 240? 7. No; The way the arcs are labeled decides
the direction of the arc. These could be two different arc measures. 8. 3.14 9. 29.53 10. (0.79x 2.36) 11. 0.12x 12. 71.62? 13. 79.20? 14. 11.27 15. 5.65 16. 8.30 17. 4.77
Lesson 9.1 Level C
1. 1.25 2. 0.12 3. 8.04 4. 4.28 5. 80.11 6. 1.08 7. 114.59? 8. 171.89? 9. 6 : 1 10. 2.24
Geometry
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