问题
填空题
已知△ABC∽△A1B1C1,AB:A1B1=2:3,则S△ABC与S△A1B1C1之比为______.
答案
∵△ABC∽△A1B1C1,AB:A1B1=2:3,
∴
=(S△ABC S△A1B1C1
)2=2 3
.4 9
已知△ABC∽△A1B1C1,AB:A1B1=2:3,则S△ABC与S△A1B1C1之比为______.
∵△ABC∽△A1B1C1,AB:A1B1=2:3,
∴
=(S△ABC S△A1B1C1
)2=2 3
.4 9