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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 radius of 4 inches, find the area.
50.27 sq inches
300
Round the following to the nearest hundredth. 21.991346
21.99
400
What are the two formulas to find the circumference?
C=πd and C=2πr
400
If the radius is 13.6 ft, find the diameter.
17.2 ft
400
Find the radius, if the diameter is 13.5 in.
42.41 in
400
If the diameter is 16 in, find the area.
201.06 sq in
400
The circumference of a circle is 314 inches, find the diameter.
100 inches
500
What are all 3 circle formulas?
C=πd, C=2πr, and A = pi r squared
500
Given the diameter is 499.5 mm, find the radius.
249.75 mm
500

Find the circumference of a circle with a diameter of 2 feet.

6.28 feet

500
If the diameter is 25 cm, find the area.
490.87 sq cm
500

Find the area and circumference of a circle with a radius of 4.2

C = 26.376 

A = 55.3896