Question 814604
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
Midpoint Pt(x,y):  ( {{{(x[1] + x[2])/2}}}, {{{(y[1] + y[2])/2  )}}})
P=(4,-1) is the midpoint of the segment AB where A=(2,5), 
find B.  {{{(2 + x[2])/2}}}= 4   and {{{(5 + y[2])/2}}}= -1
B is P(6,-7)
{{{drawing(300,300,   -10,10,-10,10,  
 grid(1),
circle(2, 5,0.4),
circle(4, -1,0.4),
circle(6, -7,0.4),
line(2,5,6,-7),
graph( 300, 300, -10,10,-10,10,0))}}}