E and F are the midpoints of the sides AB and AC respectively of ΔABC; G and H are the midpoints of sides AE and AF respectively of the ΔAEF. If GH=1.8 cm, find BC.

E and F are the midpoints of the sides AB and AC respectively of ΔABC

1.	E and F are the midpoints of the sides AB and AC respectively of ΔABC; G and H are the midpoints of sides AE and AF respectively of the ΔAEF. If GH=1.8 cm, find BC.
Answer» E and F are the midpoints of the sides AB and AC respectively of $Δ A B C$ ; G and H are the midpoints of sides AE and AF respectively of the $Δ A E F .$ If GH=1.8 cm, find BC.