Right angle ba=ac
The hypotenuse is correspondingly equal.
After congruence, the corresponding angles are equal, and the angle abd= angle ace is obtained.
Therefore, it is further obtained that the angle cfd=90 degrees, that is, BF⊥CE.
Praise my speech +0
Hello, teachers and classmates
There is no mountain high, but you are as strong as a mountain; There is no surging like the sea, but you