five quadrilaterals@@
There is quadrilateral PQRS.
AP=PS=SF,BQ=QR=RE
HP=PQ=QC, GS=SR=RD

Move point P,Q,R,S to find the geometric quality of the between quadrilateral PQRS and the blue quadrilaterals.
@You can also move points (P,Q,R,S) on CABRI.

Download CABRI‡U data (d43) from here.