How to Easily Calculate Radius from Diameter: A Step-by-Step Guide

Learn how to calculate the radius from the diameter of a circle with this simple formula and examples.

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To calculate the radius from the diameter of a circle, simply divide the diameter by 2. The formula is: radius = diameter / 2. For example, if the diameter is 10 units, the radius would be 10 / 2 = 5 units. This straightforward calculation helps in various geometric applications, such as finding the circumference or the area of a circle.

FAQs & Answers

  1. Why is knowing the radius important? Knowing the radius is crucial as it helps in calculating other properties of a circle, such as circumference and area.
  2. What other formulas involve the radius? Other formulas that involve the radius include the circumference formula (C = 2 * π * r) and area formula (A = π * r²).
  3. Can the radius be calculated from the circumference? Yes, the radius can be calculated from the circumference using the formula: radius = circumference / (2 * π).
  4. How do you find the diameter from the radius? To find the diameter from the radius, simply multiply the radius by 2. The formula is: diameter = 2 * radius.

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