Question

Fan and Medal!!!!Prove that a line that divides two sides of a triangle proportionally is parallel to the third side. Be sure to create and name the appropriate geometric figures. This figure does not need to be submitted.

Answer 1

@Loser66

Answer 2

@johnweldon1993 @SolomonZelman

Answer 3

@charlotte123

Answer 4

if I stretch EF to H such that EF = FH , I have BEF = CFH

Answer 5

so that