Two circles have the same centre. Their radii are 5 cm and 10 cm. Another circle lies between these circles. Give two possible diameters for this circle.
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Question 3
3.
Find the radius of a circle with the diameter of 7.8 cm.
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Question 4
4.
Find the radius of a circle with the diameter of 8.2 cm.
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Question 5
5.
Find the radius of a circle with the diameter of 10 cm.
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Question 6
6.
Find the radius of a circle with the diameter of 25 cm.
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Question 7
7.
Is it possible to draw two different circles with the same radius and diameter? Why or why not?
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Question 8
8.
Calculate the circumference with the radius of 6 cm.
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Question 9
9.
Calculate the circumference with the diameter of 18m.
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Question 10
10.
Calculate the circumference a wheelchair wheel with diameter 66 cm.
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Question 11
11.
Calculate the circumference a tire with radius 37 cm.
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Question 12
12.
Calculate the circumference a hula-hoop with diameter 60 cm.
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Question 13
13.
Suppose the circumference of a circular pond is 76.6 m. What is its diameter?
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Question 14
14.
Find the radius of a circle with a circumference of 256 cm.
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Question 15
15.
Find the radius of a circle with a circumference of 113 cm.
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Question 16
16.
An auger is used to drill a hole in the ice, for ice fishing. The diameter of the hole is 25 cm. What is the circumference of the hole?