General Form

Below shows the General Form of an equation of a circle:
\[{x^2} + {y^2} + hx + ky + c = 0\]
where \(h\), \(k\) and \(c\) are constants.

You can shift the sliders h, k and c to change their values in the equation of the circle.


Instructions:

1. Adjust the values of h, k and c.
2. Check all the boxes.
3. Observe the coordinates of the centre and radius of the circle.
4. Repeat steps 1 ~ 3 for other values of h, k and c.

Download the GeoGebra file: http://www.geogebratube.org/material/download/format/file/id/46519

Download the Worksheet: http://db.tt/Ed3YOJND