What is a radius ? Definition and examples.

Radius of a circle

The radius of a circle is any line segment from the center of the circle to a point on the circle.

The radius of a circle can also refer to the distance between the center of the circle and any point on the circle. Below, we show the radius with a green segment.

Radius of a circle

Radius of a sphere

The radius of a sphere is any line segment from the center of the sphere to a point on the sphere.

The radius of a sphere can also refer to the distance between the center of the sphere and any point on the sphere. Below, we show the radius with a green segment.

Radius of a sphere

Recent math words

  1. What Does Divisible Mean? Definition and Examples

    Jan 09, 19 04:18 PM

    What does divisible mean ? A number is divisible by another number if ...

    Read More

  2. How Big is 1 Foot ? Definition and Examples

    Jan 09, 19 12:41 PM

    What is 1 foot ? 1 foot is a unit of length in the customary ...

    Read More