How to Find the Radius of a Circle: Simple Formulas Explained

Learn the easy methods to calculate the radius of a circle using diameter or circumference.

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The rule to find the radius of a circle is simple: if you have the diameter, divide it by 2. The formula is Radius = Diameter / 2. Alternatively, if you have the circumference, use Radius = Circumference / (2π).

FAQs & Answers

  1. What is the formula for calculating the radius? The radius can be calculated by dividing the diameter by 2 or by using the formula Radius = Circumference / (2π).
  2. Can I find the radius if I only know the area? Yes! The radius can be found from the area using the formula Radius = √(Area / π).
  3. Is there a way to measure the radius directly? Yes, if you physically have the circle, you can measure the distance from the center to any point on the edge to get the radius.

Watch More

For more insights into geometry and mathematical concepts, check out our videos on calculating the area and circumference of a circle.

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