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Circumference
Radius/Diamater
Area
Area
Diameter
100

Diameter of 38. What is the circumference?

C=d(pi)

C=38(3.14)

C=119.32

100

Diameter is 6. What is the radius?

R= 3

100
Radius = 15 What is the area of the circle?
A=706.5
100

Radius = 19 What is the area of the circle?

A= 1133.54

100

The circumference equals 119.32. What is the Diameter?

D=38

200

Radius of 15. What is the circumference?

C=r(pi)x 2

C=15(3.14) x 2

C=706.5

200

Radius = 5 What is the diameter?

d=10

200

Radius = 5 What is the area of the circle?

A=78.5
200

Radius = 13 What is the area of the circle?

A=530.66

200

The circumference equals 94.2. What is the Diameter?

D=30

300

The diameter is 26. What is the circumference?

C=d(pi)

C=26(3.14)

C=530.66

300

Diameter= 50. What is the radius?

r=25

300

Radius = 14 What is the area of the circle?

A=615.44

300

Radius = 4 What is the area of the circle?

A= 50.24

300

The circumference equals 81.64. What is the Diameter?

D=26

400

Diameter = 40

What is the circumference? 

C=d(pi)

C=40(3.14)

C=125.6

400
Radius = 14. What is the diameter?

D=28

400

Diameter = 12 What is the area of the circle?

A=113.04
400

Diameter= 36 What is the area of the circle?

A= 1017.36

400

The circumference equals 125.6. What is the Diameter?

D=40

500

Radius= 18

What is the circumference?

C=r(pi)x2

C=18(3.14)x2

C=113.04

500

Diameter= 121. What is the radius?

R= 60.5

500

Diameter= 40 What is the area of the circle?

A=1256
500

Diameter = 50 What is the area of the circle?

A=1962.5

500

The circumference equals 113.04. What is the Radius?

R=6