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Neither radis nor rafius are recognised words in the English mathematical language.

I suggest you check and amend your spellings and resubmit the question.

Q: How do you find the radis of a circle knowing the rafius?

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If you have the radius of the circle then just plug it into the equation which ispi x r2This equation is used to find the area of a circleSo if your radius is 5 then all you do is 52 and then multiply by piHope that helps.Jamz159

You will have to measure some part of the circle. As long as you have absolutely no information about a circle, you can't do any calculations.

Divide the circumference by 3.14159265 (3.14 for rough approximation) to find the diameter of a circle.

Divide the circumference by the value of Pi - that will give you the diameter.

To find the circumference of a circle, you need only know the radius or diameter of the circle. The circumference of a circle is calculated as 2 x Pi x radius OR Pi x diameter. Pi is approximately 3.1415926.

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If you have the radius of the circle then just plug it into the equation which ispi x r2This equation is used to find the area of a circleSo if your radius is 5 then all you do is 52 and then multiply by piHope that helps.Jamz159

to find the diameter of a circle when you only have the circomference you: divide the circomference by pi (approx. 3.14)

count the number of sides?

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.

Knowing the area of a circle which is pi times radius squared will help you to find other properties of the circle

You will have to measure some part of the circle. As long as you have absolutely no information about a circle, you can't do any calculations.

Divide the circumference by 3.14159265 (3.14 for rough approximation) to find the diameter of a circle.

Divide the circumference by the value of Pi - that will give you the diameter.

To find the circumference of a circle, you need only know the radius or diameter of the circle. The circumference of a circle is calculated as 2 x Pi x radius OR Pi x diameter. Pi is approximately 3.1415926.

Since the area of a circle is pi times radius squared, take the radius and square it. Then, multiply that by 3.14, or pi to get the area of the circle.

Circumference of a circle: pi times diameter

Knowing two points on a circle does not define a unique circle, so it is impossible to find the centre of the circle as there are infinitely many centres possible.