If [math]\overline{DE}[/math] || [math]\overline{AC}[/math], what do you notice about sides AB and BC?

What do you notice about [math]\overline{CD}[/math] as you make the ratios proportional?

Create lines [math]\overline{GH}[/math] and [math]\overline{IJ}[/math] such that [math]\overline{EF}\parallel\overline{GH}\parallel\overline{IJ}[/math] (let [math]\overline{CD}[/math] contain points H and J)