Test:
Circles I - Ambitious
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Question 1:
Calculate the area of a circle if its circumference is
113.1
c
m
A
355.3
c
m
2
B
1017.9
c
m
2
C
468.2
c
m
2
D
706.9
c
m
2
Question 2:
Calculate the radius of a circle if its area is
78.54
c
m
2
A
7
c
m
B
6
c
m
C
4
c
m
D
5
c
m
Question 3:
Find the area of a sector:
A
187.61
c
m
2
B
302.64
c
m
2
C
907.92
c
m
2
D
453.96
c
m
2
Question 4:
Calculate the angle
α
if the sector area is
32.72
c
m
2
A
150
∘
B
140
∘
C
170
∘
D
125
∘
Question 5:
Calculate the area of a circle:
A
50.3
c
m
2
B
100.5
c
m
2
C
143.4
c
m
2
D
226.2
c
m
2
Question 6:
Calculate the area of a square if the area of a circle is:
64
π
c
m
2
:
A
112
c
m
2
B
128
c
m
2
C
64
c
m
2
D
116
c
m
2
Question 7:
Calculate the radius length of the circle:
A
12
c
m
B
13
c
m
C
15
c
m
D
6.5
c
m
Question 8:
Calculate the area of the shaded region:
A
7.7
c
m
2
B
11.1
c
m
2
C
12.2
c
m
2
D
6.5
c
m
2
Question 9:
Calculate the area of the shaded figure:
A
15.71
c
m
2
B
12.21
c
m
2
C
7.41
c
m
2
D
13.25
c
m
2
Question 10:
Calculate the area of the shaded region:
A
13.66
c
m
2
B
12.7
c
m
2
C
15.25
c
m
2
D
14
c
m
2
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