A:十二
B:十六
C:二十
如图为正三角形ABC与正方形DEFG的重叠情形,其中D、E两点分别在AB、BC上,且BD=BE.若AC=18,GF=6,则F点到AC的距离为____
Dear Alan,
I'm looking forward to staying in the countryside with you for one week this summer vacation.
Yours truly
Li Hua