What proportional segment lengths verify that bc∥de ? fill in the boxes to correctly complete the proportion. $$ = $$ a triangle with vertices labeled as a, b, c. side b c is base. sides a b and a c contain midpoints d and e, respectively. a line segment is drawn from d to e. side a d is labeled as 4. side d b is labeled as 6. side a e is labeled as 3.2. side e c is labeled as 4.8.