Circles: Radius, Diameter, and Circumference

Circle Terms

100

The distance from the center of a circle to the outside, also half of the diameter

 radius

200

The longest chord in a circle

 Diameter

300

A line through the circle.

 chord

400

The total amount of space inside of a circle

area

500

3.14 or 22/7

pi

Finding Radius(find the radius for all)

100

The Diameter of this circle is 5

 2.5

200

The diameter is 12

 6

300

The diameter of this circle is 27

 13.5

400

The diameter of this circle is 437

 218.5?

500

The diameter of this circle is 0.325

 0.1625

Finding Diameter (Find Diameter for all)

100

The radius of this is 5

 10

200

The radius of this circle is 2.5

 5

300

The circumference of this circle is 15.7

 5

400

The circumference of this circle is 18.84

6

500

The diameter of this circle is 194.68

 62

Finding Area(Find area for all)

100

The radius of this circle is 2

 12.56

200

The radius of this circle is 3

28.26

300

The radius of this circle is 21

 1384.74

400

The radius of this circle is 52.4

8621.6864

500

The radius of this circle is 6955

 151888158.5