Parabola Construction

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This worksheet shows how to construct a parabola.

• Point B is the parabola's focus.
• Line d is the parabola's directrix.
• The parabola is the locus of point I, which is the intersection of lines e and h.
• Lines b and e are perpendicular to line a.
• Circle g is centered on point B and passes through point F.
• Circle f is centered on point F and passes through point B.
• Line h passes through the intersections of circles f and g.
• Move point A to change the vertex of the parabola.
• Move point J to rotate the parabola around the vertex.
• Move point B to change the distance of the focus and directrix from the vertex.
• Move point E to trace the locus of point I.

Download the worksheet here.

Listed works are licensed under a Creative Commons GNU Lesser General Public License License.

This page © Copyright 2009 Michael Horvath. Last modified: February 21 2010 20:35:18.