Respostas

2014-08-18T15:51:36-03:00
Olá!

xM =  \frac{xA + xB}{2}\\\\
xM =   \frac{1 + 2}{2}\\\\
xM =  \frac{3}{2}\\\\\\
yM =  \frac{yA + yB}{2}\\\\
yM =  \frac{2+4}{2}\\\\
yM =  \frac{6}{2}\\\\
yM =3


M( \frac{3}{2}, 3)

Espero que tenha ajudado!