circle area calculator

enter the value and click "calculate", the calculation result will be displayed.

formula:
A = π r2

radius:

calculation result:

area of ​​circle:
circle diameter (2r):
circumference of circle (2πr):
what is the area of ​​the circle? the area of ​​a circle is a simple matter. extrusion of a circle on a two-dimensional plane. it tells you the area occupied by a circle in a unit square.
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