How to Calculate the Area of a Circle with an 8 cm Radius

Learn how to find the area of a circle with an 8 cm radius using the formula πr².

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The area of an 8 cm radius circle can be calculated using the formula πr². Substituting r = 8 cm, the area is π * (8 cm)² = 64π cm². Approximating π as 3.14, the area is approximately 201.06 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 A is the area and r is the radius.
  2. How do you approximate π? π can be approximated as 3.14 for easier calculations, though a more precise value is 3.14159.
  3. What is the area of a circle with a radius of 10 cm? The area of a circle with a radius of 10 cm is A = π(10 cm)² = 100π cm², which is approximately 314.16 cm².

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