问题
填空题
已知△ABC∽△A′B′C′且S△ABC:S△A′B′C′=1:2,则AB:A′B′=______.
答案
∵△ABC∽△A′B′C′,∴S△ABC:S△A′B′C′=AB2:A′B′2=1:2,∴AB:A′B′=1:
.2
已知△ABC∽△A′B′C′且S△ABC:S△A′B′C′=1:2,则AB:A′B′=______.
∵△ABC∽△A′B′C′,∴S△ABC:S△A′B′C′=AB2:A′B′2=1:2,∴AB:A′B′=1:
.2