This applet is a square:



This one shows dots that have had the transforms done one at a time:



This one shows dots that have had the transforms pre and post composed:



This one shows rectangles:



This one shows rectangles with pre and post composes:



This one shows polygons:



This one shows polygons with pre and post compose:



This one shows polylines:



This one shows polylines with pre and post compose:



This one shows lines:



This one shows lines with pre and post compose:



This one shows zeros:



This one shows errors: