What is the Radius of a Circle and How to Calculate It?

Learn the exact radius of a circle and how to calculate it using diameter and circumference formulas.

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The exact radius of a circle is the distance from the center point to any point on the circumference. To calculate it, divide the diameter by two or use the formula: radius = circumference / (2 * π).

FAQs & Answers

  1. What is the relationship between diameter and radius? The radius of a circle is half the diameter, meaning you divide the diameter by two to find the radius.
  2. What formula can I use to find the radius if I have the circumference? You can calculate the radius using the formula: radius = circumference / (2 * π).
  3. Can the radius of a circle be negative? No, the radius of a circle is always a positive value, representing a distance.
  4. How do I find the area of a circle using the radius? You can find the area of a circle with the formula: area = π * radius².

Watch More

If you found this video helpful, explore our other videos on geometry concepts and formulas to enhance your understanding of mathematics.

  1. How to Accurately Measure the Radius of a Circle Learn how to measure the radius of a circle with simple formulas and techniques.
  2. Understanding the Radius of a Circle: Simple Explanation Learn what the radius of a circle means and how it's defined in simple terms.
  3. How to Calculate the Diameter of a Circle: Easy Formula Explained Learn the simple formulas to find the diameter of a circle using radius or circumference.