How to Calculate the Radius of a Cylinder from Circumference

Learn how to find the radius of a cylinder using its circumference with this simple formula.

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To find the radius of a cylinder given its circumference, use the formula: Circumference = 2 π radius. Rearrange it to solve for the radius: radius = Circumference / (2 π). For example, if the circumference is 31.4 units, then the radius is 31.4 / (2 3.14) = 5 units. This method provides an efficient way to determine the radius if you know the cylinder's circumference.

FAQs & Answers

  1. What is the formula to find the radius from circumference? The formula is radius = Circumference / (2π).
  2. How do you measure the circumference of a cylinder? You can measure the circumference by wrapping a flexible tape measure around the circular base of the cylinder.
  3. Can I use this method for other shapes? This specific method applies to circles and cylinders. Other shapes have different formulas.
  4. What does π represent? π (pi) is a mathematical constant approximately equal to 3.14, used in calculations involving circles.

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For more insights into geometry and mathematical principles, check out our videos on calculating volume, area of shapes, and basic geometry formulas.

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