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# What are the two formulae you can use to find the circumference of a circle?

Updated: 8/20/2019

Wiki User

10y ago

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

Wiki User

10y ago
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Q: What are the two formulae you can use to find the circumference of a circle?
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### How do you work out the circunfrence of a circle?

There are two main formulae for finding the circumference of a circle. * C=2 x pi x radius * C= pi x diameter

### How to find the circumference?

To find the circumference of a circle you multiply the diameter by pi (3.14), the diameter is two times the radius.

### What is the circumference of a circle with the diameter of two?

The circumference of a circle with a diameter of two is about 6.28

### How do you find the circumference of a circle when you have the area of a circle?

you divide the area by pi. then, find the square root of the number you have. now you have the radius. find the circumference by multiplying by the diameter or by multiplying by two times the radius.

### How can you find the circumference of a circle with radius or diameter?

The circumference of a circle is equal to its diameter times pi. This is also equal to two times its radius times pi.

### Perimeter of the sector?

A track 7m wide consists of two concentric circles. The circumference of the inner circle is 440m. Find, 1) the radius of the outer circle 2) the circumference of the outer circle.

### How do you find diameter of circle?

To find the diameter you need to know what the radius of the circle which is from the center to the circumference ,the edge, then you times it by two and that's how yo find the diameter

### How do you find the radius for a circle when they give you the circumference?

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

### What is the formula for the circumference of a circle from the area?

In order to convert the area of a circle to the circumference of the circle, divide by the radius and multiply by two. The formula for the circumference of a circle is pi times the diameter.

### Is the circumference of a circle is two times the radius?

The circumference of a circle is 2*pi*radius or pi*diameter

### What is the area of a circle with a circumference of forty two units?

The area of a circle with a circumference of forty two units is 140.4 square inches.

### How do you find radius of a circle if circumference is given?

circumference = 2 x &pi; x radius &rArr; radius = circumference &divide; (2 x &pi;) Divide the circumference by two times &pi; (&asymp; 6.283).