Q: How do you find the radius and diameter when they give you a circumference?

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the equation for the circumference of a circle is 2*radius*pi, or since the radius is half of the diameter 2*radius=diameter, we can simplify the equation to the circumference of a circle=diameter*pi

Circumference divided by pi to find the diameter then divide that by 2 to give you answer!! Formula: R=c/pi/2 eg. circumference =60 so, 60 divided by pi = 19.098, then divide 19.098 by 2 to give you 9.549!!

Use the formula : pi * radius * radius = circumferance. (the radius is half of the diameter).A2The above answer will give you the area, not the circumference. To get the circumference from the diameter just multiply by pi. Circumference = pi x Diameter.i agree, very ezyou know everything is not always ez pz i am in sixth grade even my mom does not know it.

Divide the diameter by 2, this will give you the radius. multiply the radius by the radius, this gives you the radius squared. Multiply the raduis squared by Pi (3.14) to get the circumference. Formula : Circumfrence = Pi X R squared so, if the diameter is 10, the radius is 5, the radius squared is 25, 25 X 3.14= circumference

The radius is half the diameter.

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Circumference divided by pi to find the diameter then divide that by 2 to give you the radius.

You divide the circumference by Pi (about 3.1416). This gives you the diameter. Divide the diameter by two to get the radius.

circumference=2(pi)r so divide the given circumference on 2pi, it will give radius. Now multiply radius by 2 you will get the diameter.

They would have to give you enough information to eventually get the diameter. If they gave you the area of a circle and asked for the circumference, you can determine the radius, and from the radius the diameter, and then the circumference. If they said "What is the circumference if the area of a circle is 36pi?" Area of a circle is pi*r2, which would give us a value for r = 6 Diameter is 2*r, or = 12. Circumference is d*pi, or 12pi

the equation for the circumference of a circle is 2*radius*pi, or since the radius is half of the diameter 2*radius=diameter, we can simplify the equation to the circumference of a circle=diameter*pi

Doubling the radius will give the diameter and times this by pi will give the circumference of the circle.

Dividing the circumference by 2*pi will give the value of the radius.

Divide the circumference by Pi (3.14159), and that will give you the diameter. Divide that number by 2 to find the radius.

Divide the circumference by pi, and that will give you the diameter. Then take half of the diameter (the radius), and plug it into the formula for the area of a circle (A=πr²)

By dividing the circumference by 2*pi will give you the radius and twice the radius gives you the diameter.

Circumference divided by pi to find the diameter then divide that by 2 to give you answer!! Formula: R=c/pi/2 eg. circumference =60 so, 60 divided by pi = 19.098, then divide 19.098 by 2 to give you 9.549!!

If you know the diameter of a circle you simply divide the diameter by 2 to get the radius. This is because the diameter is twice the length of the radius. For example, if the diameter is 10 divide by two which will give you the answer of 5 for the radius. Half it because: diameter/2 = radiusTo answer your question you must have a certin diameter. You must go 2pie times your diameterThe perimeter of a circle is called the circumference. The circumference is the distance around the circle.The circumference, C, of a circle is given by the formulawhere r is the radius of the circleA radius is half the diameter