How to use the applet: You can change the values for angle A and sides [i]a[/i] and [i]b[/i] by entering them in the appropriate boxes. You can swivel side [i]a[/i] by clicking and dragging the endpoint. Hold down the right mouse button and use the scroll wheel to zoom in or out. Centre the triangle by using the arrow keys. Reset to default by clicking on the icon in the top right hand corner.