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The distance across a circle through the center is called the diameter.

## Diameter - Wikipedia

en.wikipedia.org/wiki/Diameter

In geometry, a diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. It can also be ...

## Radius, diameter, & circumference | Area and circumference of ...

Learn the relationship between the radius, diameter, and circumference of a circle.

## How to Calculate the Diameter of a Circle (with Cheat Sheet)

www.wikihow.com/Calculate-the-Diameter-of-a-Circle

How to Calculate the Diameter of a Circle. Calculating a circle's diameter is easy if you know any of the other dimensions of the circle: the radius, the ...

## Diameter - math word definition - Math Open Reference

www.mathopenref.com/diameter.html

The diameter of a circle is the length of the line through the center and touching two points on its edge. In the figure above, drag the orange dots around and see  ...

## Circumference of a Circle - Math Goodies

www.mathgoodies.com/lessons/vol2/circumference.html

The distance across a circle through the center is called the diameter. Pi is the ratio of the circumference of a circle to the diameter. Thus, for any circle, if you ...

## How Do You Find the Diameter of a Circle if You Know its Radius ...

Note: When you know the radius of a circle, you can find the diameter of that circle with a simple multiplication problem! Follow along with this tutorial to learn  ...

## Diameter Of A Circle - Math A Tube

www.mathatube.com/geometry-diameter-of-a-circle.html

The diameter of a circle can be foumd by the following formula d = 2r or d = 2 x radius. Video on how to find the diameter of a circle.