Answer: 35 units
Explanation:
We know that the triangle midpoint theorem says that the line segment connecting the midpoints of two sides of a triangle is parallel to the third side and is congruent to one half of the third side.
In the given triangle B , D, F are the midpoints of the triangle.

Then , in the given triangle if BD is connecting the midpoints of AC and CE then it must be parallel to AE and equals to FE ( half of AE).
⇒ BD ≅ FE= 35 units
Then , the length of line segment FE = 35 units