How to Calculate Radius from Circumference or Area

Learn how to find the radius without given diameter using circumference or area formulas. Simple steps for accurate calculations.

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To find the radius if the diameter is not given, use the formula involving the circumference or area. For circumference: Radius = Circumference / (2 * π). For area: Radius = √(Area / π). Measure the circumference or area using a measuring tool and substitute the values into the formulas for an accurate result.

FAQs & Answers

  1. What is the formula for radius using circumference? The formula for radius using circumference is Radius = Circumference / (2 * π).
  2. How can I find the radius from area? To find the radius from area, use the formula Radius = √(Area / π).
  3. Why is it important to know the radius? Knowing the radius is crucial for calculating other geometric properties, including circumference and area.
  4. What tools do I need to measure circumference or area? You can use a measuring tape to measure circumference or a ruler for measuring dimensions needed to calculate area.

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