(1)因为AC‖BD,所以∠ACD==∠CBD,又因为∠ABC==∠CDB==90°,所以△ABC∽△CDB.
(2)AC^2=AB^2+BC^2,所以AC=10;CD/BC=AB/AC,可求CD=24/5,BD/BC=BC/AC,可求BD=18/5.