Circumference/Area of a Circle
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Circumference/Area of a Circle
1) A rotating sprinkler that sprays water at a radius of 11 feet is used to water a lawn. Find the area of the lawn that is watered. Leave your answer in terms of π.
2) Catie bought an 8 foot leash for her dog. She wants to find out the distance her dog runs when it runs one circle with the leash fully extended. Should she calculate the circumference or the area?
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Explain how you knew it was either the circumference or area. Use key words from the problem to back up your answer
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3) How far did the dog run? Leave your answer in terms of π. (Show your work and label your answer.) 4) The largest tree in the world by volume is in the Sequoia National Park. The diameter at the base is 36 feet. Find the circumference of the circle to the nearest foot. If a person with outstretched arms can reach 6 feet, how many people would it take to reach around the base of the tree? Use the π button on your calculator.
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6) Mindy is putting lace trim around the border of a circular tablecloth. The tablecloth has a diameter of 1.2 meters. To the nearest meter, what is the least amount of lace she needs? Use the π key on your calculator. 7)
8) 9.
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Round your answer for the radius to the nearest tenth.