Vocabulary
Radius
If the radius is 3, what is the area?
9pi, or 28.26
If the diameter is 8, what is the circumference?
8pi, or 25.12
If the radius is 12, what is the diameter?
24
If the diameter is 100, what is the radius?
50
The distance across a circle through its center is called its...
Diameter
If the radius is 8, what is the area?
64pi, or 200.96
If the diameter is 10, what is the circumference?
10pi, or 31.4
If the radius is 6, what is the diameter?
12
If the diameter is 15, what is the radius?
7.5
The distance around the outer edge of a circle is called its...
Circumference
If the diameter is 20, what is the area?
100pi, or 314
If the radius is 2, what is the circumference?
4pi, or 12.56
If the circumference is 16pi, what is the diameter?
16
If the circumference is 18pi, what is the radius?
9
To find this measurement of a circle, you multiply the radius times itself, then multiply by pi
Area
If the diameter is 15, what is the area?
56.25pi, or 176.625
If a wheel has a diameter of 4, how far would it travel in 5 rotations?
20pi, or 62.8
If the circumference is 9.42, what is the diameter?
If the circumference is 6.28, what is the radius?
1
What is the constant of proportionality between the diameter and circumference of any circle?
pi
If the circumference is 12pi, what is the area?
36pi, or 113.04
If a wheel has a radius of 8, how far would it travel in 3 rotations?
48pi, or 150.72
If the area is 9pi, what is the diameter?
6
If the area is 25pi, what is the radius?
5