Dynamic Proof of Altitude/Circumcenter Concurrency

In the sketch below, the altitudes are shown, as is the centriod.
Drag the α-slider all the way to the right.
Next, drag the d-slider all the way to the left.

This new rotated and dilated triangle is what?
The new rotated and dilated altitudes are what?

Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now)

Steve Phelps, Created with GeoGebra