How do circumference

How do I find the area of a circle with a circumference of 1 meter? This is the circle's diameter , in this case, Divide by 2. This result is the circle's radius of That's it; a circle with a circumference of 1 meter has an area of How to find the radius of a circle with a circumference of 10 centimeters? The result is the circle's diameter, 3.

And there you go, the radius of a circle with a circumference of 10 centimeters is 1. What is the unit of the circumference of a circle? Bogna Szyk and Mateusz Mucha. Radius r. Circumference c. Arc length Area Area of a circle … 40 more. People also viewed…. Knowing your BMR basal metabolic weight , may help you make important decisions about your diet and lifestyle.

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Pre-Algebra Introducing geometry Overview Geometry — fundamental statements Circle graphs Angles and parallel lines Triangles Quadrilaterals, polygons and transformations. But we know that our radius could be written as circumference divided by two pi.

So instead of radius I'll write circumference over two pi. Remember, we want to relate between area and circumference. And so what is this going to be equal to? We get area is equal to pi times circumference squared, over two pi squared is four pi squared. Now let's see, we have a pi, if we multiplied this out, we'd have a pi in the numerator and a pi in the denominator, or two pi's in the denominator being multiplied.

So pi divided by pi squared, is just one over pi, and so there you have it. Area is equal to circumference squared divided by four pi. Let me write that down. So this is a neat, you don't tend to learn this formula, but it's cool that we were able to derive it. Area is equal to circumference squared over four pi. And we can go the other way around. Given an area, how do we figure out circumference?

Well you could just put the numbers in here, or you could just solve for c. Let's multiply both sides by four pi. Let's multiply both sides by four pi, and if we do that, what do we get? We would get four pi times the area is equal to our circumference squared and then to solve for the circumference we just take the square root of both sides.

The diameter is the length of a straight line drawn through the center of a circle from one side to the other. The circumference is the length all the way around the outside of the circle.

Not Helpful 39 Helpful The perimeter of a circle is the same as its circumference, the distance around it. Not Helpful 54 Helpful Circumference is the distance around the perimeter of a circle. It is calculated by multiplying the distance across the center diameter by Pi 3. Not Helpful Helpful Double the radius to get the diameter. Then multiply by pi to get the circumference. Not Helpful 74 Helpful The diameter is just the radius times two, so divide the diameter by two and you will have the radius of the circle!

To get the diameter of a circle take the circumference C and divide it by pi 3. Divide the circumference by pi. That's the diameter. Divide by 2. That's the radius. Square the radius, and multiply by pi.

That's the area. Not Helpful 97 Helpful The diameter is twice the radius. The circumference is diameter x pi, or 2 x radius x pi. If your radius is a mixed number, turn the number into an improper fraction. To do this, simply multiply the whole number part by the denominator and add that number to the numerator.