How to Calculate the Length of a Circle (Circumference)

Learn how to calculate the circumference of a circle using simple formulas. Get tips for accurate calculations.

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To calculate the length of a circle, also known as the circumference, use the formula: C = 2πr, where 'C' is the circumference and 'r' is the radius. Alternatively, if you have the diameter 'd', you can use C = πd. Make sure to use the same units for both radius or diameter to ensure correct calculation.

FAQs & Answers

  1. What is the formula for the circumference of a circle? The formula for the circumference is C = 2πr, where 'C' is the circumference and 'r' is the radius.
  2. How do I find the radius if I know the circumference? You can find the radius by rearranging the circumference formula: r = C / (2π).
  3. Can I calculate circumference using diameter? Yes, you can use the formula C = πd, where 'd' is the diameter of the circle.
  4. What units should I use for calculating circle length? Make sure to use the same units for radius or diameter to ensure accuracy in your calculation.

Watch More

For more math tips, check out our videos on area calculations and geometric shapes for deeper insights into geometry.

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