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  1. www.omnicalculator.com › math › circumferenceCircumference Calculator

    2 dni temu · The formula for the circumference, if the circle's radius is given, is: 2 × radius × π; Or if the circle's diameter is given: Diameter × π; You can estimate π as 3.14.

  2. www.khanacademy.org › cc-7th-area-circumference › aRadius, diameter, & circumference | Circles (article) | Khan...

    Another formula to find the circumference is if you have the diameter you divide the diameter by 2 and you get the radius. Once you have the radius you times the radius by 2 and times it by pie and then you get the circumference. Here are the two different formulas for finding the circumference: C = πd C = 2πr

  3. www.omnicalculator.com › math › radius-of-a-circleRadius of a Circle Calculator

    6 dni temu · The radius of a circle calculator returns the length of a circle's radius based on the input data: the circumference, area, or diameter.

  4. www.omnicalculator.com › math › circleCircle Calculator

    3 dni temu · If you know the radius or diameter of the circle, the area of the circle formula is: a = πr² = π × (d / 2)². If radius and diameter are unknown, you can calculate it from the circumference: a = c² / 4π. If you are interested in calculations of some fraction of a circle, check:

  5. www.khanacademy.org › v › circles-radius-diameter-and-circumferenceRadius, diameter, circumference & π (video) | Khan Academy

    Learn how the number Pi allows us to relate the radius, diameter, and circumference of a circle. Created by Sal Khan.

  6. www.gigacalculator.com › calculators › circumference-of-circle-calculatorCircumference of a Circle Calculator

    Circumference of a Circle Calculator. Use this calculator to easily calculate the circumference of a circle, given its radius in any metric: mm, cm, meters, km, inches, feet, yards, miles, etc. If you know the diameter, first divide it by two to get the radius.

  7. www.calculator.net › circle-calculatorCircle Calculator

    This calculator computes the values of typical circle parameters such as radius, diameter, circumference, and area, using various common units of measurement.