Question 1

Which is the best estimate of the radius (r)?

Accepted Answer

2.3m

Answer

3.3m

Answer

2m

Answer

3m

Question 2

The area of a circle is represented by the equation A  =πr$^{2}$, where r  is the radius. The area is 64 π m$^{2}$

What is the length of the diameter?

Accepted Answer

16 meters

Answer

32 meters

Answer

4 meters

Answer

8 meters

Question 3

Beth has a garden in the shape of a circle in her backyard. Beth needs to find the area of the garden in order to buy the appropriate amount of soil.

If the diameter of Beth's garden is 8 feet, what is the area of the garden? (Use 3.14 for π)

Accepted Answer

50.24 ft$^{2}$

Answer

25.12 ft$^{2}$

Answer

157.75 ft$^{2}$

Answer

200.96 ft$^{2}$

Question 4

A unicycle wheel has a diameter of 24 inches.

If the wheel revolves 3 times clockwise, approximately how far does the unicycle travel? (Use 3.14 for π)

Accepted Answer

226.08 in

Answer

113.04 in

Answer

37.68 in

Answer

75.36 in

Question 5

The front wheel on a cyclist’s bicycle has a radius of 14.5 inches. What is the approximate area of the bicycle’s front wheel? (Use 3.14 as an approximation for π)

Accepted Answer

660.185 square inches

Answer

91.06 square inches

Answer

165.046 square inches

Answer

45.53 square inches

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