Show:
Radius
Diameter
Circumference
Area
Pi
100
Define Radius
From the center of the circle to the outside edge
100
Define Diameter
Through the center from one edge to the opposite edge
100
Define Circumference
The distance around the outside edge of the circle
100
Define Area
The space inside the boundary of a circle
100
What number do we use for pi?
3.14
200
If a circle's diameter is 10, what is its radius?
5
200
If a circle's radius is 12, what is its diameter?
24
200
If a circle's radius is 1, what is its circumference?
6.28
200
If a circle's radius is 3, what is its area?
28.26
200
FILL IN THE BLANK:

The ratio of ____________ to _____________ = pi

Circumference

Diameter

300
If a circle's circumference is 18.84, what is its radius?
3
300
If a circle's circumference is 78.5, what is its diameter?
25
300
If a circle's diameter is 15, what is its circumference?
47.1
300
If a circle's diameter is 1, what is its area?
.785
300
What is the formula for circumference?
C = pi * D
400
If a circle's area is 200.96, what is its radius?
8
400
If a circle's area is 314, what is its diameter?
20
400
If a circle's area is 153.86, what is its circumference?
21.98
400

If a circle's circumference is 18.84, what is its area?

28.26

400
What is the formula for area?
A = pi * r^2
500

Arthur ran around a circular field 3 times. If he ran a total distance of 750 m, what is the radius of the field?

39.81m
500

Mr. Smith designed a circular walkway in

front of his house. The diameter of the walkway is

about 6 feet long. How does the diameter of the

walkway compare to its circumference?

The diameter is about 1/3 as large as the

circumference.

500

Elena cycled to school. Find the distance traveled by Elena if her bicycle wheels rotated 840 times and the radius is 0.25 m.

1318.8
500

A storm is expected to hit 7 miles in every direction from a small town. What is the area that the storm will affect?

153.86 square miles

500
What fraction is the closest to pi?
22/7