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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.
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What formula do you use to find the perimiter of a circle?
2 * pi * r
What is the perimiter of a circle if the circumference?
The perimeter of a circle is its circumference
What is the formula for finding the perimiter of a parallelogram?
Add the four sides.
What is the formula to find the perimiter?
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.
What is the perimiter of a circle with a diameter of 12cm?
perimeter of a circle = circumference = pi x diameter perimeter = 3.1416 x 12 = 37.7 cm
