Posted by **maxine** on Thursday, May 14, 2009 at 9:58pm.

Q1: Find the length and midpoint of segment PQ given P(3,2) and Q(-1,4)

Q2: The midpoint of AB is M(1/2 , 6). Given A(3,7), find the coordinates of B.

- pre cal -
**Reiny**, Thursday, May 14, 2009 at 10:08pm
for the points (a,b) and (c,d) the midpoint is ((a+c)/2, (b+d)/2)

so midpoint of PQ = ((3-1)/2,(2+4)/2) = (1,3)

for #2

let B be (a,b)

then isn't (a+3)/2 = 1/2

and (b+7)/2 = 6 ?

solve for a and b

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