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Circle Calculator

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What is a Circle Calculator?

A circle calculator computes various properties of a circle based on its radius. It calculates area, circumference, and diameter using standard circle formulas. All calculations use π (pi) ≈ 3.14159.

Understanding circle properties is fundamental in geometry, engineering, and many practical applications. This calculator automatically updates as you enter the radius.

Circle Formulas

  • Area: A = π × r²
  • Circumference: C = 2 × π × r
  • Diameter: d = 2 × r

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