How to find the radius from the circumference?

How to find the radius from the circumference?

How do I find the radius from the circumference? To find the radius from the circumference of a circle, you have to do the following: Divide the circumference by π, or 3.14 for an estimation. The result is the circle’s diameter. Divide the diameter by 2. And there you go, you found the circle’s radius.

How do you find the diameter of a circle?

If you want to find the diameter from the circumference of a circle, follow those steps: Divide the circumference by π, or 3.14 for an estimation. And that’s it; you have the circle’s diameter .

When to use a circumference or area calculator?

Use our circumference calculator to find the radius when you only have the circumference or area of a circle. If you wish to calculate the properties of a three-dimensional solid, such as a sphere, cylinder or cone, it’s best to use our volume calculator.

What is the ratio of circumference to diameter?

You have probably noticed that, since diameter is twice the radius, the proportion between the circumference and the diameter is equal to π: C/D = 2πR / 2R = π. This proportion (circumference to diameter) is the definition of the constant pi.

Is the circumference of a circle the same as the diameter?

The ratio of the circumference to diameter of both circles is This turns out to be true for all circles, which makes the number one of the most important numbers in all of math! We call the number pi (pronounced like the dessert!) and give it its own symbol . which lets us find the circumference of any circle as long as we know the diameter .

How to calculate the radius of a sphere?

Sphere surface area to radius calculator. User Guide. This tool will calculate the radius of a circle from the circumference, and will convert different measurement units for circumference and radius. Formula. The formula used to calculate the circle radius is: r = C / (2 · π) Symbols. r = Circle radius. C = Circle circumference.

How do you find the area of a circle?

The formula to find the area when radius is given is. Area of circle = π*Radius*Radius. In the above formulas, π=3.14159 and R is the radius. You can read more about circumference in this WikiPedia article – Circumference.

What can you do with a circumference calculator?

This means you can use this tool to do other calculations such as diameter to circumference, radius to area, radius to cicumference, area to radius, area to circumference etc. Infact, all the numbers are shown as soon as you type any one number. This is useful if you need to quickly calculate the circumference for whatever reasons.