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Radius
Diameter
Circumference
Area
Vocabulary
100
How do you convert diameter to radius
What is 1/2 d or divide by 2
100

How do you convert radius to diameter

What is 2r or radius times 2

100
What is the formula for circumference
What is Pi times diameter
100
What is the formula for area
What is Pi times radius squared
100
The distance from the center of a circle to any point on a circle
What is radius
200
d = 6 inches
What is 3 inches
200
r = 7m
What is 14m
200

r = 2ft

What is 12.56 ft

200

4 = 4 ft

What is 50.24 ft squared

200
The distance around a circle
What is circumference
300
d = 17 m
What is 8.5 m
300

r = 16in

What is 32in

300
d = 8 ft
What is 25.12 ft
300
r = 6ft
What is 113.04 ft squared
300

The space of a figure is the number of unit squares that cover the surface of a closed figure (The grass in the yard if you were laying sod)

What is area

400

d = 42in

What is 21in?

400
Area = 28.26 ft
What is 6ft
400
r = 9 cm
What is 56.52 cm
400
r = 13 m
What is 530.66 m squared
400
The distance from one point on a circle to another point on a circle going through the center of the circle
What is diameter
500

d = 325 cm

What is 162.5 cm

500
C = 200.96 km
What is 16 km
500
d = 7.5 in
What is 23.55 in
500

r = 8 mm

What is 200.96 mm squared

500
3.14
What is Pi