Converse of basic proportionality theorem says that if a line divides any two sides of a triangle in the same ratio, then the line must be parallel to the third side.
Given: In triangle JKL, where line segment MN is dividing JK and Jl at M and N respectively.
Now,
Thus,
⇒ segment MN is not parallel to segment KL [by converse of basic proportionality theorem]