What is the circumference of a circle with diameter 63 inches?

Here is the answer to questions like: how to find the perimeter of a circle with diameter 63 inches?

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Result:

The circumference of a circle with diameter 63 is 197.9(*)

Formulas:

Image of Circle r = 31.5 d = 63 C = 198
C = 2·π·r
C = π·d
C = √4·π·A
π = 3.1415
A = area of the circle
C = circumference or perimeter
r = radius, d = diameter

Step-by-step Solution:

Circumference of a cicle in terms of radius:

Circumference = 2·π·r = 2·3.14·31.5 = 197.9(*)

In terms of diameter:

Circumference = π·d = 3.14·63 = 197.82(*)

In terms of area:

Circumference C = √4·π·A = √4·π·3117 = 197.9(*)

(*) 197.9 inches exactly or limited to de precision of this calculator (13 decimal places).

Note: for simplicity, the operations above were rounded to 2 decimal places and π was rounded to 3.14.

Use the this circumference length calculator above to find the perimeter of a circle given its diameter, or other parameters.

Formula to calculate the circumference of a circle

Here a three ways to find the circumference or perimeter of a circle:

Circumference length formula in terms of radius

C = 2·π·r

Circumference length formula in terms of diameter

C = π·d

Circumference length formula in terms of area

C = √4·π·A

Questions this calculator can answer:

  • How to find the perimeter of a circle with a radius of 31.5 inches?
  • A circle has a diameter of 63 inches. What is its circumference?
  • If a circle has a area of 3117 square inches. What is its perimeter?

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