Circle Calculator
Radius (r)
units
Diameter (d)
units
Circumference (C)
units
Area (A)
square units
Results
Formulas Used
- Area: A = πr²
- Circumference: C = 2πr
- Diameter: d = 2r
- Radius from Area: r = √(A/π)
- Radius from Circumference: r = C/(2π)
Where π (pi) ≈ 3.14159
Area
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square units
Circumference
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units
Radius
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units
Diameter
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units
Additional Properties
Arc Length (90°): -
Sector Area (90°): -
Chord Length (90°): -
Segment Area (90°): -