Applying Area and Circumference

A circular race track has a diameter of 1/2 mile.
How far does a car travel in one lap around the 
track?

• 1 mile

• 0.25 miles

• 1.57 miles

• 15.7 miles

The London Eye has a diameter of 120 meters. If you are sitting in one of the capsules, about how far do you travel in one rotation of the Ferris wheel?

• 180 meters

• ^{380 meters}

• ^{11,300 meters}

• 125 meters

If the problem ask you to find the distance around a circle, which formula should you use?

• r = 1/2d

• d = 2r

• C = πd

• A = πr²

If the word problem is asking you to find the space inside the circle, which formula should you use?

• r = 1/2d

• d = 2r

• C = πd

• A = πr²

The circumference of a circle is 31.4 meters.  What is the approximate length of the radius?

• 3 m

• 4 m

• 5 m

• 6 m

The circumference of a circle is 18.41 feet.  What is the approximate length of the diameter?

• 3 ft

• 5 ft

• 6 ft

• 8 ft

A sprinkler that sprays water in a circular area can be adjusted to spray up to 30 feet. To the nearest tenth, what is the maximum area of lawn that can be watered by the sprinkler?

• 188.4 ft²

• 706.5 ft²

• 183.6 ft²

• 2,826 ft²

The Girl Scout patch shown has a radius of 1.25 inches.  Approximately, what is the area of the patch?

• 5 sq. in

• 6 sq. in

• 7 sq. in.

• 8 sq. in.

Find the circumference.

• 11.0 mm

• 153.9 mm

• 44.0 mm

• 38.5 mm

Find the diameter of a circle with a circumference of 65.97 meters.

• 3.2 m

• 10.5 m

• 21 m

• 33 m