
Challenge
Exercises: Circumference and Area 

Unit 2
> Lesson 5 of 6 
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 = 3.14 to
calculate your answers.

1.

A dinner plate has a radius of 6 centimeters. What is the area?

2.

The distance around the wheel of a truck is 9.42 feet. What is the diameter of the wheel?

3.

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

4.

What is the circumference of a 12inch pizza?

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?

6.

The distance around a carousel is 21.98 yards. What is the radius?

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?

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?

9.

A semicircle shaped rug has a diameter of 2 feet. What is the area of the rug?

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?

