1. △ABC中,AB:AC:BC=4:3:2,△A1B1C1中,A1B1:A1C1:B1C1=3:2:4,則△ABC與△A1B1C1______(相似或
設BC=2a,A1C1=2b,∵AB:AC:BC=4:3:2,A1B1:A1C1:B1C1=3:2:4,∴AB=4a,AC=3a,A1B1=3b,B1C1=4b,∴