How to Calculate the Radius of a Circle from its Diameter

Learn how to find the radius of a circle by dividing the diameter by 2. Simple step-by-step guide.

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To find the radius of a circle if you have the diameter, simply divide the diameter by 2. The formula is: radius = diameter / 2. For example, if the diameter is 10 units, the radius would be 5 units.

FAQs & Answers

  1. What is the formula to find the radius of a circle? The formula is radius = diameter / 2.
  2. Why is the radius half of the diameter? The radius is half the diameter because the diameter is the distance across the circle passing through the center, while the radius is from the center to the edge.
  3. Can you explain the relationship between radius and diameter? Yes, the radius is always half the length of the diameter, which connects two points on the circle's edge through the center.

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