### Home > INT1 > Chapter Ch11 > Lesson 11.2.3 > Problem11-80

11-80.

In the triangle at right, $\overline{DE}$ is a midsegment of $ΔABC$ and $\overline{FG}$ is a midsegment of $ΔADE$. If $DE = 7$ cm, find $FG$ and $BC$.

$ΔADE\simΔABC$

Since $D$ is the midpoint of $\overline{AB}$, $2 ·DB = AB$.

$FG = 3.5$ cm
$BC = 14$ cm