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This online calculator will find and plot the equation of the circle that passes through three given points.
You can enter either integers (10), decimal numbers(10.12) or FRACTIONS (10/3).
Important: The form will NOT let you enter wrong characters (like *, (, ), x, p,...)
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Welcome to MathPortal. This web site owner is mathematician Miloš Petrović.
I designed this web site and wrote all the lessons, formulas and calculators.
If you want to contact me, probably have some question write me using the contact form or email me on