Understanding Circle Properties: Diameter vs Radius Explained

Learn how the diameter of a circle is directly related to its radius, along with simple formulas for calculations.

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The diameter of a circle is always twice the radius. If you know the radius (r), multiply it by 2 to get the diameter (D = 2r). Similarly, if you have the diameter, divide it by 2 to find the radius (r = D/2).

FAQs & Answers

  1. How do you calculate the diameter from the radius? Multiply the radius by 2 (D = 2r) to get the diameter.
  2. What is the relationship between diameter and radius? The diameter is always twice the radius of a circle.
  3. Can you find the radius if you only have the diameter? Yes, divide the diameter by 2 (r = D/2) to calculate the radius.
  4. What is the formula for the area of a circle? The area can be calculated using the formula A = πr², where r is the radius.

Watch More

For more insights into geometry, check out our videos on circumference, area of circles, and other fundamental math concepts.

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