1.a
π/6
b
11π/6
c
π/4
d
π/18
e
f
/36
g
4π5
h
25π/36

 

2.a
0.593
b
5.31
c
0.489
d
3.12
e
1.22
f
8.73
g
3.84
h
5.22

 

3.a
15°
b
126°
c
67.5°
d
90°
e
225°
f
720°
g
450°
h
360°

 

4.a
28.6°
b
57.3°
c
131.78°
d
71.8°
e
359.8°
f
0.7°
g
114.6°
h
180°

5.

a. Length of arc = 10.5 mm Area of sector = 26.2 mm2
b. Length of arc = 30 mm Area of sector = 225 mm2
c. Length of arc =28.7 cm Area of sector = 135 cm2
d. Length of arc = 20. 6 m Area of sector = 77.3 m2

6. a. The length of the arc is 10.5 cm.

b. The angle is 2 radians.

c. The radius is 10 cm.

d. The radius is 2.38 cm.

e. The radius is 9.67 mm.