How to Calculate the Area of a Circle with a 22 cm Diameter

Learn to calculate the area of a circle with a 22 cm diameter using the formula A = πr².

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The area of a circle with a diameter of 22 cm can be calculated using the formula: A = πr². Here, the radius (r) is half the diameter, so r = 11 cm. Substituting the values gives: A = π * 11² ≈ 380.13 cm².

FAQs & Answers

  1. What is the formula for the area of a circle? The formula for the area of a circle is A = πr², where r is the radius.
  2. How do you find the radius from the diameter? The radius is half of the diameter. For a diameter of 22 cm, the radius is 11 cm.
  3. What is the area of a circle with a radius of 11 cm? The area is approximately 380.13 cm² using the formula A = π * 11².
  4. Can I use this formula for circles of different sizes? Yes, you can use the same formula, A = πr², for circles of any size by substituting the correct radius.

Watch More

For more insights on geometry and area calculations, check out our videos on calculating areas of various shapes, including triangles and squares.

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