Current location - Training Enrollment Network - Mathematics courses - Mathematics teaching in eighth grade
Mathematics teaching in eighth grade
My mind is a little strange!

Let AM be perpendicular to EF, the vertical foot be m point, CN be perpendicular to EF, and the vertical foot be n point.

As can be seen from the figure

△AME is an isosceles right angle △, so AM=EM.

Similarly, CN=NF can be obtained.

MN=2

So EF=ME+NF-MN

Calculate the answer yourself.