Circle Formulas
Area = πr²
Circumference = 2πr = πd
r = d/2 = C/(2π) = √(A/π)
Circle Calculator
Enter any one value to calculate all circle properties.
Area
0
Circumference
0
Radius
0
Diameter
0
Formulas
A = πr² = π × 0² = 0
C = 2πr = 2π × 0 = 0
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