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NAME______________________
Block_____
GEOMETRY WORKSHEET
Section 10.2 – ARCS AND CENTRAL ANGLES
Date_______
In each Circle O, the radius is 12. In each find the length of AB (The answer is the length of the
segment, not the measure of arc AB.) (Fill in the diagram.)
1. AB = _______
2. AB = _______
12
O
A
B
O
B
A
3. AB = _______
O
60o 12
B
A
For each of the following, find the measure of
4. m  1 = _______
 1 (O is the center of the circles):
5. m  1 = _______
85o
130o
280o
1
O
6. m  1 = _______
O
1
(continued on the next page)
O 1
Section 10.2 – ARCS AND CENTRAL ANGLES WORKSHEET
PAGE 2
Use the circle Q shown below to answers Questions #7-18
7. measure of arc AB = _______
D
8. measure of arc DC = _______
9. measure of arc BC = _______
E
50o
Q
10. measure of arc AED = _______
C
11. measure of arc BD = _______
40o
12. measure of arc AC = _______
13. measure of arc BAD = _______
A
14. measure of arc ADC = _______
B
15. measure of arc ACB = _______
16. measure of arc ABD = _______
17. measure of arc CED = _______
18. measure of arc BAC = _______
Identify the following using the diagram shown to the
right from the choices in the box.
_____19. QC
_____20. Arc BDE
_____21.
_____22.
_____23.
_____24.
AD
Arc ABD
 AQB
Point Q
_____25. ED
_____26. Point C
_____27. AB
_____28. Arc EA
_____27. CG
A) Center
B) Point of tangency
C) Radius
D) Chord
E) Diameter
F) Secant
G) Tangent
H) Central Angle
J) Minor Arc
K) Major Arc
L) Semicircle
D
G
E
Q
C
A
B