问题补充:
如图,E,F分别是矩形ABCD一组对边AD,CB的中点,已知矩形AEFB∽ABCD,求AB:BC的值
答案:
根据题意,可知AE=FB=AD/2=BC/2
∵AEFB∽ABCD
∴AE/AB=AB/BC
AB^2=AE·BC=(BC/2)·BC=BC^2/2
(AB/BC)^2=1/2
AB/BC=√2/2
答:AB:BC的值为√2/2.
时间:2019-09-16 20:36:17
如图,E,F分别是矩形ABCD一组对边AD,CB的中点,已知矩形AEFB∽ABCD,求AB:BC的值
根据题意,可知AE=FB=AD/2=BC/2
∵AEFB∽ABCD
∴AE/AB=AB/BC
AB^2=AE·BC=(BC/2)·BC=BC^2/2
(AB/BC)^2=1/2
AB/BC=√2/2
答:AB:BC的值为√2/2.