Angle B= angle c

D is the midpoint of BC.

BD=CD

E and f are the midpoint of AB and AC, respectively.

EB=0.5AB FC=0.5AC

AB=AC EB=FC

In the triangle EBD FCD

EB=FC angle B= angle C BD=CD.

Two triangles are congruent.

Angle EDB= angle FDC

EFD is an equilateral triangle.

Angle EFD= Angle EDF=60 degrees.

Angle EDB+ Angle EDF+ Angle FDC= 180 degrees.

Angle EFD= angle FDC

EF parallel BC

3 Small problem possible angle A=60 degrees