Triangle A C B is cut by line segment E D. Line segment E D goes from side B C to side A C. The length of B A is 4 x minus 6 and the length of E D is x + 2. The length of B E is x. Sides B E and E C are congruent. Sides A D and D C are congruent. We can apply the triangle midsegment theorem: ED = One-halfBA. Evaluate the equation for x. What is the length of BC? a 5 b 6 c 10 d 2.5