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# How do you find the perimeter if you already know the circumference of a circle?

Updated: 12/23/2022

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12y ago

The circumference of a circle is the length of the circle's perimeter.

Wiki User

12y ago

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Q: How do you find the perimeter if you already know the circumference of a circle?
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### How do you find the perimeter when circumference is given?

When the shape is a circle, then the perimeter is called"circumference".The circumference IS the perimeter of a circle.

### What is the equation to find the perimeter of a circle?

Circumference ("perimeter") of a circle = (pi) x (diameter of the circle)

### What is the value and perimeter if the circumference of a circle if it is 3 ft?

The circumference of a circle is the same as the perimeter of a circle, so the perimeter and circumference would both be 3 ft.

### How do you find the diameter of a circle with the perimeter?

The equivalent of a "perimeter" in a circle is actually called its circumference. To get the diameter, just divide the circumference by pi.

### How do you find the perimeter of a semi circle with a diameter of 12mm?

-- Find the circumference of a full circle with a diameter of 12 mm.-- The perimeter of the semi-circle is(1/2 the circumference of the full circle) + (the diameter).

### How do you find the perimeter for a semi circle?

Its perimeter is half of its circumference plus its diameter

### How do you find the perimeter from the diameter?

The perimeter or circumference of a circle = diameter times pi

### How do you find the circumference of a circle if only the perimeter is given?

The perimeter of a circle is the circumference. If you mean the circle is drawn around (and touches the 4 corners of) a square, and you know the perimeter of the square, you divide the square's perimeter by 4, do pythagorean's theorem on the 2 sides (legs) to find the hypotenuse, and that hypotenuse will be the diameter of the circle. You then multiply that diameter you get by pi to get the circumference.

### How do you find the length of perimeter or circumference of a circle?

Since pi is the ratio of a circle's circumference to its diameter, multiply the diameter by pi (about 3.14159) to get the circumference.

### Is a perimeter a part of a circle?

A circle does not have a perimeter, but it has a circumference, which is pretty much the same thing. To find the circumference, multiply pi(3.14) times the diameter which is the distance across the center of the circle. I hope this helped

### Why would you need to find the circumference of a circle?

As for example when constructing a round-about on a road you'll need to know its perimeter which is the circumference of a circle.

### How do you find the perimeter of a half circle with the raduis of 7 inches?

The perimeter of a circle is called the circumferenceTo find the circumference of a circle you do 2 times pi times radiusC = 2 * 3.14159 * 7 = 43.98inchesSince this is a half circle you have to take half of the circumference...you answer is 21.99inches