(If you don't see an "open GeoGebra" button, try reloading the page.)

The car jack: 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) (Adjust the jack by grabbing point C.)

Generic trig: 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)