How to Calculate the Area of a Circle from Its Radius
Learn the simple formula to calculate the area of a circle using the radius. Perfect for students and math enthusiasts.
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To get the area of a circle from the radius, use the formula Area = π × radius². Simply multiply the radius by itself to get the squared value, then multiply by π (approximately 3.14159). For example, if the radius is 3, the area would be π × 3², which equals 28.27 square units.
FAQs & Answers
- What is the formula for the area of a circle? The formula for the area of a circle is Area = π × radius².
- How do you find the radius if you have the area? You can find the radius by rearranging the formula: radius = √(Area/π).
- What is the value of π? The value of π is approximately 3.14159.
- Can you give an example of calculating area from radius? Yes! For a radius of 3, the area would be π × 3², which equals about 28.27 square units.