Diameter
Radius
Circumference
Area/ other
100

What is one equation for diameter

2xr

Circumference/ π

D=(2)(√Aπ)


100

What is an equation for the radius?

r = C/2π 

r = D/2

100

What is the equation for circumference?

C = 2πR


100

What is the equation for the area of a circle?

A=πr2


200

What is the diameter of a circle with a radius of 12.5

25

200

What is the radius of a circle with the diameter of 56

28

200

What is the circumference of a circle with a radius of 4

25.12

200

What are the common digits of pi

3.14

300

What is the diameter of a circle a circumference of 67 (round)

21

300

Radius of a circle with a diameter of 123.3

61.65

300

What is the circumference of a circle with a radius 6

18.8

300

Area of a circle with a radius of 5

31

400

Diameter of a circle with a radius of 29.25

58.5

400

Radius if a circle with a circumference of 26

3

400

Circle with a radius of 9

28.27

400

What is the equation of a circle

(x-h)2 + (y-k)2 = r2

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