Formula
radius/diameter
Circumference
Area
A little of Everything
100
The formula for the circumference of a circle, given the diameter.
C = π d
100
If the diameter is 14 inches, this is the radius.
7 inches
100
Find the circumference, if the radius is 3 ft. Round to the nearest hundredth.
18.85 ft
100
Find the area, if the radius is 3 m.
28.27 sq m
100
Round the following to the nearest hundredth. 351.3274123
351.33
200
The formula for the circumference of a circle, given the radius.
C = 2 π r
200
If the radius is 5 m, this is the diameter.
10 m
200
Find the circumference given the diameter is 20 m.
62.83 m
200
Find the area, if the radius is 9 yards.
254.47 sq yards
200
Round the following to the nearest hundredth. 113.098167
113.10
300
The formula for the area of a circle.
A = pi r squared
300
Given the diameter is 25 cm, what is the radius?
12.5 cm
300

Find the circumference, given the radius is 2 miles.

12.57 miles

300

A round loaf of bread has a diameter of 8 inches, find the area.

50.27 sq inches

300

What is the difference between finding the Area and Circumference of a circle? (must use specific details)

Area is finding the space taken up by a circle and uses the formula Pi(R)2 , while circumference is the distance around a circle and uses the formula 2(Pi)R

400

What are the two formulas to find the circumference (one uses radius, one uses diameter)?

C=πd and C=2πr

400

If the radius is 13.6 ft, find the diameter.

27.2 ft

400

Find the radius, if the Circumference is 42.41 in. Round your answer to two decimals.

6.75

400

If the area is 201 inches, find the Radius.

8

400

If a pie's area is 254 sq inches, how big is each slice if it is cut into 4 equal slices?

63.5 inches

500

What is the formula for a circle's: Circumference given radius, Circumference given the diameter and Area?

C=πd, C=2πr, and A = pi r squared

500
Given the diameter is 499.5 mm, find the radius.
249.75 mm
500

Given the circumference is 6.30 feet, find the diameter. Round to the nearest whole number

2 feet

500

If the area is 490.87 sq cm, what is the Diameter? (round to the nearest cm)

25 cm

500

If the circumference of a circle is 44 ft, find the area to the nearest foot.

154 sq feet.

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