Move point

Guillermo Bautista, Created with GeoGebra

The green trace generated by point

*C*and observe what happens.Guillermo Bautista, Created with GeoGebra

The green trace generated by point

*D*is a parabola. A*parabola*is the set of points equidistant from a given point (*focus*) and from a given point (*directrix*). In the applet above, point*B*is the locus and the red line is the directrix.**Snapshot**
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