Circle Circle Circle

Radius

100

use 3.14 for pi

c= 66 ft

d= ________

r= ________

d= 21.01910/  r=10.50955414

200

How do find the radius if you only are given the circumference? 

ghjkjhgfghjmhgf

300

What is the radius of a circle with a diameter of 88?

r=44

400

Mary wanted to buy a placemat but the circumference has to be 65 cm. What is the radius of the required placemat?

r= 10.3503185

500

c=678 what is the radius 

108

Diameter

100

How do find the Diameter with only the radius is given?

multiply the radius by 2

200

What is the Diameter of a circle with the circumference of 7

d= 2.22929936

300

What is the diameter of a circle with a radius of 7.999?

D=15.998

400

What is the Diameter or a circle if the radius is 12345? No calculators
 

24690

500

What is the Diameter of a circle that has the circumference of 123456789? Round to the nearest thousandth.

D= 39,317,448.7

Circumference

100

How do find the circumference if only the radius is given?

multiply the radius by 2 and 3.14 

r x 2 x 3.14

200

How do find the circumference of a circle when you only have the diameter? 

 d x 3.14= C

300

What is the circumference of a circle with a radius of 0.68?

4.3

400

If the diameter of a circle is 5 what is the circumference?

15.7 

500

The circumference of a circle is 29 and the radius is 7.  True or False 

False 

Mixed

100

You get a free 100 points 

yay

200

What is the diameter and radius of a circle with the circumference of 189?

diameter=60.2

raduis= 30.1 

300

Erin has a math problem, she is drawing 6 circles for the base of her snowmen, but the snowmen's base has to have the circumference of 10. What should her diameter be?

d=3.2

400

The circumference is 67 the diameter 30. True or False.

False 

500

List the 4 formulas you need for circles

(Circumference, Area, Pi, Diameter/Radius)

C=(pi)d

A=(pi)r²

(pi)=C/d

d=2r