Explain why [math]\bigtriangleup{ABC}\sim\bigtriangleup{DEF}[/math], and then find the length of [math]\overline{DF}[/math].

[list=1][br][*]Show that the triangles are similar.[br][*]Find the length of [math]\overline{DF}[/math].[br][/list][br][br]This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit www.walch.com for more information.