### Home > CC4 > Chapter 11 > Lesson 11.2.3 > Problem 11-80

11-80.

In the triangle at right, *DE* is a midsegment of Δ*ABC* and *FG* is a midsegment of Δ*ADE*. If *DE* = 7 cm, find *FG* and *BC*. Homework Help ✎

Δ*ADE* ~ Δ*ABC*

Since *D* is the midpoint of line *AB*, 2 ·*DB* = *AB*.

*FG* = 3.5 cm*BC* = 14 cm