How to Calculate the Area of a Circle: Example with a 20-Diameter Circle

Learn how to find the area of a circle with a 20 diameter using the formula for area calculation.

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The area of a circle with a 20 diameter can be calculated using the formula Area = π(r²). With a radius of 10 (half of the diameter), the area is π * 10², which equals approximately 314.16 square units.

FAQs & Answers

  1. What is the formula for the area of a circle? The formula for the area of a circle is Area = π(r²), where r is the radius.
  2. How do you convert diameter to radius? To convert diameter to radius, divide the diameter by 2.
  3. What does π (Pi) equal? π (Pi) is approximately equal to 3.14 and is the ratio of the circumference of a circle to its diameter.
  4. Can I calculate area with only the diameter? Yes, you can use the diameter to find the radius and then use the area formula.