Diameter to Radius
Find the Circumference
Find the Area
Mix of Problems
100

The diameter is 20 what is the radius?

10

100

If the Diameter is 10? 

31.4

100

the Radius is 6?

113.04

100

The circumference is 50.24, what is the diameter?

16

200

The Radius is 7 what is the Diameter?

14

200

If the Diameter is 8?

25.12

200

If the Radius is 10?

314

200

Radius is 11 what is the Area?

379.94

300
The Radius is 5.5 what is the Diameter?

11

300

Radius is 3?

18.84

300

If the Radius is 12?

452.16

300

The circumference 28.26, what is the radius?

4.5
400

The diameter is 21 what is the Radius?

10.5

400

If the diameter is 15?

47.1

400

If the diameter is 10?

78.5

400

The Circumference 43.96.  What is the Diameter?

14

500

The Diameter is 48, what is the Radius?

24

500

If the radius 9?

56.52

500

If the diameter is 15?

176.625

500

The Radius is 12, What is the circumference?

75.36