Mr. Ahrens' Class - Home
Chapter 9 Study Guide
Name:____________________________Date:_______________________
|1.) If you know the diameter of a circle, how do you find the area of that circle? Explain the steps clearly. |
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|2.) What is the diameter of a circle if the circumference is approximately 47.12 feet? |
|A. Approximately 15 feet |
|B. Approximately 148 feet |
|C. Approximately 7.5 feet |
|D. Approximately 30 square feet |
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|3.) If you know the radius of a circle, how can you find the circumference of that circle? Explain your steps clearly. |
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|4.) A bicycle tire has a circumference of approximately 81.68 inches. |
|a. What is the radius of the tire? |
|b. What is the diameter of the tire? |
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|5.) A pizza is advertised as containing 250 square inches of pizza. |
|a. Is 250 the area or the circumference and how do you know? |
|b. Find the diameter of this pizza. |
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|6.) Answer these questions about 4 different circles. |
|a. What is the circumference of a circle that has a diameter of 20 feet? |
|b. What is the circumference of a circle that has a radius of 5 cm? |
|c. A circle has a circumference of 10 feet. What is the diameter? |
|d. A circle has a circumference of 63 feet. What is the radius? |
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|7.) What is the area of the shaded region in the figure? |
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