Challenge Exercises: Circumference and Area

Circumference and Area

Directions: Read each question below. Click once in an ANSWER BOX and type in your answer; then click ENTER. After you click ENTER, a message will appear in the RESULTS BOX to indicate whether your answer is correct or incorrect. To start over, click CLEAR. Use pi.gif = 3.14 to calculate your answers.

1. A dinner plate has a radius of 6 centimeters. What is the area?
ANSWER BOX:  cm2  

RESULTS BOX: 

2. The distance around the wheel of a truck is 9.42 feet. What is the diameter of the wheel?
ANSWER BOX:  ft  

RESULTS BOX: 

3. A lawn sprinkler sprays water 5 feet in every direction as it rotates. What is the area of the sprinkled lawn?
ANSWER BOX:  ft2  

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4. What is the circumference of a 12-inch pizza?
ANSWER BOX:  in  

RESULTS BOX: 

5. A dog is tied to a wooden stake in a backyard. His leash is 3 meters long and he runs around in circles pulling the leash as far as it can go. How much area does the dog have to run around in?
ANSWER BOX:  m2  

RESULTS BOX: 

6. The distance around a carousel is 21.98 yards. What is the radius?
ANSWER BOX:  yd  

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7. A storm is expected to hit 7 miles in every direction from a small town. What is the area that the storm will affect?
ANSWER BOX:  mi2  

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8. An asteroid hit the earth and created a huge round crater. Scientists measured the distance around the crater as 78.5 miles. What is the diameter of the crater?
ANSWER BOX:  mi  

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9. A semi-circle shaped rug has a diameter of 2 feet. What is the area of the rug? 
ANSWER BOX:  ft2  

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10. A spinner has 6 sectors, half of which are red and half of which are black. If the radius of the spinner is 3 inches, what is the area of the red sectors?
ANSWER BOX:  in2  

RESULTS BOX: