In trapezoidal ABCD, ad ‖ BC (AD > BC), Mn is the midpoint of two waist AB, CD, me ‖ an, judge the number and position of AM and ne 22: Go to the space of 470783401 to see the picture AD<BC

In trapezoidal ABCD, ad ‖ BC (AD > BC), Mn is the midpoint of two waist AB, CD, me ‖ an, judge the number and position of AM and ne 22: Go to the space of 470783401 to see the picture AD<BC

equal
Because m is the midpoint of ab
So am = MB
Because of the trapezoid
So AB / / BC / / Mn ∠ amn = ∠ MBE
So, Dan = anm = NME = MEB
And because am = BM, ∠ amn = ∠ MBE
So triangle amn congruent triangle MBE
So be = Mn
And because be / / Mn
So mneb is a parallelogram
So MB = ne
So ne = am