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The perimeter of a circle is called the circle's "circumference". It's the distance an ant must walk

on the curved line in order to get back to where he started walking from.

The diameter of the circle is the distance across it through the center. It's the longest line

you can draw that stays completely inside the circle.

The radius of the circle is half of the diameter. It's the distance from the center to any point

on the circle.

The circumference if the circle is (pi) times (the diameter).

The circumference is also (2 pi) times (the radius).

(Pi) is approximately 3.14159 26535 89792 . The decimal never comes out even.

It's also OK to use ( 22/7 ) for pi. That puts you within 0.1% of the correct answer.

Q: What is the formula for the perimiter of a circle?

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2 * pi * r

The perimeter of a circle is its circumference

Add the four sides.

It depends what shape you are trying to find. If it is a circle, use the following:C = DpiCircumference = Diameter x PiTake the diameter of the circle, or twice the radius, and multiply it by pi, which is ~3.14If it is any other shape, just add up the sides if they are given.

perimeter of a circle = circumference = pi x diameter perimeter = 3.1416 x 12 = 37.7 cm

Related questions

2 * pi * r

circumference

The perimeter of a circle is its circumference

the perimiter =D

No,Circumference is like the perimiter and Area is the whole circle.

multiply all of the sides than that is your answer

Add the four sides.

The formula for finding the perimiter of a rectangle is add up all of its sides

C = (pi)/d or c = 2(pi)r.

It depends what shape you are trying to find. If it is a circle, use the following:C = DpiCircumference = Diameter x PiTake the diameter of the circle, or twice the radius, and multiply it by pi, which is ~3.14If it is any other shape, just add up the sides if they are given.

The perimeter is pi*r + 2r = 92.6 cm

to find the perimiter you just add up all the sides....Perimiter is the same for every figure.