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you cant: pi is the same for any circle - 3.1415...

the diamter or the radius has to be given

diameter divided by two equals the radius

the radius times two equals the diameter

Q: When you are given pi of a circle how do you find the radius and diameter?

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The radius of a circle is half of the diameter! So, if the diameter was four inches, the radius would be two inches!

You times the radius by 2.

Divide the diameter by 2.

Diameter of a circle = 2*radius Circumference of a circle = 2*radius*pi

The longest chord in a circle is its diameter and halve of this is its radius.

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Double the radius

you have multiplythe radius by 2 to get the diameter

The radius of a circle is half of the diameter! So, if the diameter was four inches, the radius would be two inches!

You times the radius by 2.

Divide the diameter by 2.

Diameter of a circle = 2*radius Circumference of a circle = 2*radius*pi

The longest chord in a circle is its diameter and halve of this is its radius.

well, the radius is half of the diameter, so if i were you id divide by two

circumference of a circle = 2*pi*radius or pi*diameter

If you mean the diameter and radius of a circle given the circumference it is:- diameter = circumference/pi radius = circumference/(2*pi)

If the circumference or diameter is given then you can find the radius or simply measure the distance from the centre of the circle to the circumference.

multiple the diameter by 2 to get the radius, then use your equation and go from there