Circle Through a Given Point

Rarely Tested

Circle Through a Given Point

For:

$$ x^2+y^2+2gx+2fy+c=0 $$

if $$(x_1,y_1)$$ lies on the circle:

$$ x_1^2+y_1^2+2gx_1+2fy_1+c=0 $$

Usage

- Used to determine unknown constants of a circle passing through a specified point.

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