How to Calculate the Radius of a Circle: Step-by-Step Guide

Learn how to find the R value (radius) of a circle using diameter or circumference in this quick tutorial.

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To find the R value (radius) of a circle, you need either the diameter or the circumference. If you have the diameter, divide it by 2: R = diameter / 2. If you have the circumference, divide it by 2π: R = circumference / 2π.

FAQs & Answers

  1. What is the formula to calculate the radius from the diameter? The formula to calculate the radius from the diameter is R = diameter / 2.
  2. How do you calculate the radius from the circumference of a circle? To find the radius from the circumference, use the formula R = circumference / 2π.
  3. What is the importance of knowing the radius of a circle? Knowing the radius helps in calculating the area and circumference of the circle, which are essential in various fields.
  4. Can you find the radius if you only know the area? Yes, you can find the radius from the area using the formula R = √(area / π).

Watch More

For more resources on geometric concepts and calculations, check out our videos on circumference, diameter, and other related math topics.

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