SOLUTION: find the coordinated of the missing endpoint if P is the midpoint of NQ. what formula do i use for this?

Algebra ->  Formulas -> SOLUTION: find the coordinated of the missing endpoint if P is the midpoint of NQ. what formula do i use for this?      Log On


   

Question 400996: find the coordinated of the missing endpoint if P is the midpoint of NQ. what formula do i use for this?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
In words:
( endpoint #1 + endpoint #2) / 2 = midpoint
You need to use this formula twice, once for
x-coordinates, and again for the y -coordinates
----------------------------------
suppose the endpoints are:
(0,1) and (7,5)
(7 + 0)/2 = 7/2
and
(5 + 1)/2 = 3
The midpoint is (7/2 , 3)
--------------------
To check, the equation that includes the endpoints is
%28y+-+1%29%2F%28x+-+0%29+=+%285+-+1%29%2F%287+-+0%29
%28y+-+1%29%2Fx+=+4%2F7
y+-+1+=+%284x%29%2F7
y+=+%284%2F7%29%2Ax+%2B+1
Does it include the midpoint?
+3+=+%284%2F7%29%2A%287%2F2%29+%2B+1
3+=+2+%2B+1
3+=+3
OK