How to draw a parabola from a geometric artboard

1, the use of line tool to make a ray, using Point tool in the ray to take a little f.

2, select the ray endpoint and ray, select "Construction"-"vertical". To perpendicular to the line of parabola, using point tools in the vertical take a point k, with line-segment tools to connect KF.

3, select the line of KF, select "Construction"-"midpoint" constructs a midpoint e, select the E point and line KF, select "Construction"-"vertical."

4, select the ray and point K, select "Construction"-"parallel", parallel lines intersection perpendicular bisector to point m, select the point m, K, select "Construction"-"trajectory" to get the parabola.

5, select the point m, K, select "Show"-"Tracking Point", select Point K, select "Edit"-"Action class button"-"animation", to set it accordingly. Select perpendicular bisector and Parallel lines, press "Ctrl+h" to hide.

6, tracking point M, when the point K in the alignment of reciprocating movement, point M is the trajectory of the parabolic line. Drag the point F to observe the position of the parabola shape and the alignment.