Posted by **t.c** on Tuesday, January 25, 2011 at 10:14pm.

how do you work out a radius and diameter dont know at all there is a circle with the number 5mm and they want me to tell them what the radius is and the diameter

- math -
**Ms. Sue**, Tuesday, January 25, 2011 at 10:22pm
What does the 5mm represent?

Is it the circumference?

- math -
**Bosnian**, Tuesday, January 25, 2011 at 10:23pm
The common distance of the points of a circle from its centre is called its radius.

Diametar=2*Radius

go to en.wikipedia and type circle in search field.

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