Unit 11 Contents

Professor Peabody was having fun exploring different numbers for the circumference and the diameter of circles on his calculator. Use the key on your calculator to solve the problems.

1. Find the circumference of a circle that has a diameter of 3367 inches. Round your answer to the nearest inch.
2. Find the diameter of a circle that has a circumference of 82,771 inches. Round your answer to the nearest inch.

First estimate in your head. Then use your calculator to find a better estimate of the diameter for the circles with circumferences listed in Questions 3 and 4. Round your answer to the nearest tenth of a unit.

3. C = 942 units
4. C = 8075 units

First estimate in your head. Then use your calculator to find a better estimate of the circumference for the diameters listed in Questions 5 and 6. Round your answer to the nearest tenth of a unit.

5. D = 9460 units
6. D = 5977.6 units
7. A trundle wheel is a disk that rolls along the ground and clicks once every time it makes a complete turn. It is often used for surveying land. What is the diameter of a trundle wheel that clicks once every meter? Round your answer to the nearest hundredth of a meter.

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