The circumference of a circle is C centimeters. The diameter of the circle is 13 centimeters.
The value of \pi is __________ bacause the formula for the circumference of a circle is __________ and the diameter of this circle is __________centimeters.
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Question 2
2.
Find the circumference of the circle. Round your answer to the nearest tenth.
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Question 3
3.
Find the area of the circle. Round your answer to the nearest tenth.
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Question 4
4.
A spotlight can be adjusted to effectively light a circular area of up to 6 meters in diameter. To the nearest tenth, what is the maximum area that can be effectively lit by the spotlight?
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Question 5
5.
The world’s largest flower, the Giant Rafflesia, is 91 centimeters in diameter. Use a calculator to determine the circumference of a Giant Rafflesia to the nearest tenth.
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Question 6
6.
The bull’s eye on an archery target has a radius of 3 inches. The entire target has a radius of 9 inches. To the nearest tenth, determine the area of the target outside of the bull’s eye.
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Question 7
7.
Ubehebe Crater in Death Valley has a diameter of a little more than \frac{1}{2} mile. If Latisha walks around its rim at a rate of 2 miles per hour, about how long will it take her to walk all the way around the crater? Round your answer to the nearest tenth.
It will take Latisha _______ hours to walk around the crater.
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Question 8
8.
Determine the area of a semicircle with a diameter of 28 cm. Use 3.14 for π. Round to the nearest tenth if necessary.
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Question 9
9.
A mountain bike wheel has a radius of 13 inches. How many feet will the bike travel in 7 revolutions? Round to the nearest tenth of a foot.
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Question 10
10.
A welcome mat in front of the hardware store is a half-circle. The straight side of the mat is 24 inches. What is the perimeter of the mat? Round to the nearest inch.
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Question 11
11.
A Ferris wheel has a circumference of 89.49 feet. What is the approximate radius of the Ferris wheel to the nearest hundredth of a foot? Use 3.14 for \pi.