Question Number 102196 by mathocean1 last updated on 07/Jul/20

ABCD is a square with center O.  AB=5 cm.  EFGH is a square such as   AE=BF=CG=DH.  1) Show with Chasles rules that  EF^(→) .FG^(→) =0^→   2) Determinate the area of EBFO  according to the area of ABCD.