How to Calculate Circumference Using Radius - Step-by-Step Guide

Learn how to easily calculate circumference from radius using the formula C = 2πr in this quick tutorial.

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To find the circumference with the radius, use the formula: C = 2πr, where 'C' is the circumference and 'r' is the radius. Multiply the radius by 2 and then by π (approximately 3.14159) to get the circumference.

FAQs & Answers

  1. What is the formula for circumference using radius? The formula for circumference using radius is C = 2πr, where C is the circumference and r is the radius.
  2. How do you find circumference if you only have the radius? You multiply the radius by 2 and then by π (approximately 3.14159) to calculate the circumference.
  3. What does C represent in the circumference formula? In the formula C = 2πr, C represents the circumference of the circle.
  4. How accurate is the value of π when calculating circumference? The value of π is approximately 3.14159, but you can use more decimal places for greater accuracy in calculations.

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