Question 207074
perp. bis.  is also a bisector, meaning it must hit in the MIDDLE.

if A(-4,1) then call B(x,y).

if x=2,  2,1 is the midpt. of AB; as midpt. of something is a line; here, it is a horiz. straight line.

Now use midpt. formula.

-4 + x/2  , 1 +y/2 = 2,1

for x; set -4 + x/2=2; find x.  x=8

for y; set 1+y/2 = 1;  y=1

B(8,1);  check.

is 2,1 between A and B?  use midpt. to find out...


yes:)



Edd