Respostas

2013-09-26T10:44:39-03:00
Ponto medio  M(x,y)
a)
x=(xa+xb)/2 =>  (150-7)/2=143/2
y=(ya+yb)/2 => (6+8)/2 = 14/2 = 7

M(143/2,7)

b)
x=(xa+xb)/2 => (4+1)/2 = 5/2
y=(ya+yb)/2 => (3+7)/2 = 5

M(5/2,5)