Construction of the Quadratrix III

You will also want to construct a movement button to “reset” the sketch. In order to do this select the following points in order E, B, C' and C, then Action Buttons, then Movement under the Edit menu (see Figures 8 and 9).  

Figure 8:  Constructing a Movement Button to "Reset" Your Sketch

Figure 9:  Properties of the Movement Button

Click on the movement button to reset the sketch, press the Esc button twice to erase any traces in your sketch window, and click on the Animation button to activate the animation.  Click here  to see the animation. The locus of point F is called the “Quadratrix of Hippias”.