How to Calculate the Area of a Circle with a 30cm Diameter

Learn how to easily calculate the area of a circle with a diameter of 30cm using simple formulas.

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To calculate the area of a circle with a diameter of 30cm, use the formula Area = πr², where r is the radius. The radius is half the diameter, so r = 15cm. Therefore, Area = π * (15cm)² ≈ 706.86 cm².

FAQs & Answers

  1. What is the formula to calculate the area of a circle? The formula to calculate the area of a circle is Area = πr², where r is the radius.
  2. How do you find the radius from the diameter? The radius is half of the diameter. So, if the diameter is 30cm, the radius would be 15cm.
  3. What is the area of a circle with a 15cm radius? The area of a circle with a 15cm radius is approximately 706.86 cm².
  4. Why is π used in circle area calculations? π (pi) is used in circle calculations because it represents the ratio of the circumference of a circle to its diameter.

Watch More

For more insights into circle calculations, check out our videos on circumference calculations and advanced geometry concepts.

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