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Circle Calculator
I want to enter:
Radius (r)
Diameter (d)
Circumference (C)
Area (A)
Radius (r)
Calculate
Results
Radius (r)
-
Diameter (d)
-
Circumference (C)
-
Area (A)
-
Circle Formulas
Diameter:
d = 2r
Circumference:
C = 2πr
Area:
A = πr²