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Radius, Diameter And Circumference
Test Description: Find the radius, diameter and circumference of a circle.
Instructions: Answer all questions to get your test result.
1) If the radius of a circle is 7 cm, what is the diameter?
A
16 cm.
B
14 cm
C
1 cm.
D
3.5 cm
2) If the diameter of a circle is 50 mm, what is the radius?
A
10 cm
B
2.5 cm.
C
100 cm
D
25 cm
3) What is the formula for circumference if you know the radius?
A
c = pi x d
B
c = r x pi
C
c/d = r
D
c = 2r x pi
4) What is the formula for circumference if you are given the diameter?
A
c= 2r x pi
B
c = pi x d
C
c/pi = d
D
c = pi x r squared
5) Find the circumference of a circle with a diameter of 4 in.
A
12.57 in.
B
50.24 in
C
25.12 in.
D
6.28 in.
6) Find the circumference of a circle with a radius of 7 m.
A
44 m
B
10.99 m
C
21.98 m
D
153.86 m
7) Find the circumference of a circle with a radius of 5 1/2 ft,
A
34.56 ft
B
78.5 ft.
C
32.03 ft.
D
31.4 ft
8) Find the circumference of a circle with a 14 mm diameter.
A
not able to calculate
B
44 mm
C
87.92 mm
D
21.98 mm
9) Find the circumference of a circle that has a radius of 1 inch.
A
9.42 inches
B
6.28 inches
C
3.14 inches
D
12.56 inches
10) If the circumference of a circle is 50.24, and the radius is 8. What is the ratio of the circumference to the diameter?
A
3.14
B
6.28
C
16
D
12.56
*select an answer for all questions
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