Circle Terms
The distance from the center of a circle to the outside.
Radius
The radius of a circle whose diameter is 5.
2.5
The diameter of a circle whose radius is 5
10
The circumference of a circle whose diameter is 3
3𝜋 or 9.42
The area of a circle whose radius is 2
4𝜋 or 12.56
From one side of a circle to the other, through the center.
Diameter
The radius of a circle whose diameter is 12
6
The diameter of a circle whose radius is 2.5
What is 5
The circumference of a circle whose radius is 8
16𝜋 or 50.24
The area of a circle whose diameter is 6
9𝜋 or 28.26
The distance around the outside of a circle.
Circumference
The radius of a circle whose diameter is 125
62.5
The diameter of a circle whose circumference is 8𝜋
8
The circumference of a circle whose radius is 12.5
25𝜋 or 78.5
The area of a circle whose diameter is 8
16𝜋 or 50.24
The total amount of space inside of a circle
Area
The radius of a circle whose circumference is 16𝜋
8
The diameter of a circle whose circumference is 16𝜋
16
The circumference of a circle whose area is 16𝜋
8𝜋 or 25.12
The area of a circle whose circumference is 12𝜋
36𝜋 or 113.04
3.14 or 22/7
Pi or 𝜋
The radius of a circle whose area is 25𝜋
5
The diameter of a circle whose area is 25𝜋
10
The circumference of a circle whose area is 25𝜋
10𝜋 or 31.4
The area of a circle whose circumference is 4𝜋
4𝜋 of 12.56