JAVA worksheet - drag vertex

Drag the vertex P. What happens to the area of the overlap? This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com
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TASKJAVA-worksheetM1M1+M2M2+M3M3+V1V1+V1++V1+++PSMOVIES