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How to Calculate the Area of a Circle with a Diameter of 20

Learn to calculate the area of a circle with a diameter of 20 using the area formula and radius.

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Video transcript

To find the area of a circle with a diameter of 20, use the formula: Area = π * (radius)^2. Since the diameter is 20, the radius is half of that, which is 10. Therefore, the area is π * (10)^2, or approximately 314.16 square units.

Questions and answers

  1. What is the formula for the area of a circle?

    The formula for the area of a circle is Area = π × (radius)².

  2. How do you find the radius from the diameter?

    The radius is found by dividing the diameter by 2.

  3. Can you calculate the area of a circle without knowing the radius?

    Yes, you can calculate it using the diameter by applying the formula: Area = π × (diameter/2)².

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For more insights into geometry and mathematical calculations, check out our videos on circle properties and geometric formulas.