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How to Calculate the Area of a Circle with a Diameter of 36?

Learn how to easily calculate the area of a circle given its diameter using the formula A = πr².

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Video transcript

The area of a circle can be calculated using the formula A = πr². Given the diameter is 36, the radius r is 18. Substituting the values, we get A = π * 18², resulting in an area of approximately 1,017.88 square units.

Questions and answers

  1. What is the area of a circle with a diameter of 36?

    The area is approximately 1,017.88 square units.

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

    The radius is half of the diameter; for a diameter of 36, the radius is 18.

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

    The area of a circle is calculated using the formula A = πr².

  4. Why is π important in circle calculations?

    π (pi) is a constant that represents the ratio of the circumference of a circle to its diameter, essential for circle formulas.

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