How to Calculate the Area of a Circle with a 5 cm Radius

Learn how to calculate the area of a circle with a 5 cm radius using the formula A = πr².

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What is the area of a 5 cm circle? The area of a circle is calculated using the formula A = πr². For a circle with a radius of 5 cm, the area is approximately 78.5 square centimeters. This can be derived by squaring the radius (5 cm) and multiplying by π (≈ 3.14).

FAQs & Answers

  1. What is the formula for calculating the area of a circle? The formula is A = πr², where A is the area and r is the radius.
  2. How do you find the radius if you know the area? You can find the radius by rearranging the formula: r = √(A/π).
  3. What does π represent in mathematics? π (pi) is a constant approximately equal to 3.14 that represents the ratio of a circle's circumference to its diameter.
  4. Can the area of a circle be negative? No, area is always a positive value as it represents the space within the shape.

Watch More

For more insights on geometry and mathematics, check out our tutorials on calculating volumes and areas of various shapes.

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