How to Calculate the Circumference of a Circle from its Diameter

Learn the simple formula to calculate the circumference of a circle using its diameter with clear examples.

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To get the circumference of a circle using the diameter, simply use the formula: Circumference = π × Diameter. For example, if the diameter is 10 units, the circumference would be 10π units, or approximately 31.42 units when rounded to two decimal places.

FAQs & Answers

  1. What is the formula for the circumference of a circle? The formula is Circumference = π × Diameter.
  2. How do you find the diameter if you have the circumference? You can find the diameter by using the formula Diameter = Circumference / π.
  3. Why do we use π (pi) in calculating circumference? π is the ratio of a circle's circumference to its diameter, which is approximately 3.14.
  4. Can you calculate the circumference without knowing the diameter? To calculate the circumference, you must know either the diameter or the radius.

Watch More

For more mathematical insights, check out our videos on geometry basics and other circle-related formulas to enhance your understanding.

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