ABC和A1B1C1中,AB/A1B1*BC/B1C1=AC/A1C1=3/5,AB+AC+BC=16.5m,A1+B1+C1=?

问题描述:

ABC和A1B1C1中,AB/A1B1*BC/B1C1=AC/A1C1=3/5,AB+AC+BC=16.5m,A1+B1+C1=?
need!急

ABC和A1B1C1中,AB/A1B1*BC/B1C1=AC/A1C1=3/5,AB+AC+BC=16.5m,A1+B1+C1=?是不是:AB/A1B1=BC/B1C1=AC/A1C1=3/5,AB+AC+BC=16.5m,A1B1+B1C1+C1A1=?A1B1+B1C1+C1A1=5AB/3+5BC/3+5AC/3=5(AB+BC+AC)/3=5×16.5/3=27...