I'm trying to figure out a way to find the center point and radius of a circle given 3 points.

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I found this page:
http://mathforum.org/library/drmath/view/55233.html

The math seems not too difficult, but I don't quite know how to translate unknown variables to code.

For example, in processing, I can't create an equation with pow(x, 2) when x isn't yet known. How could I make this work? I know that there is the papaya library that can handle some of this, but I struggle there for 2 reasons:

1) I'd like to know how to code this from scratch for my own understanding and

2) I'm not quite sure what to do with the polynomial functions that are included anyway

Thank you, I'd appreciate some direction on this

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thinking about learning how to think in order to more effectively learn

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