SOLUTION: points M and N are the mid-points of AC and BC, respectively. Show that d(MN) = 1/2[d(AB)] C(b,c) A(0,0) B(a,0)

Algebra ->  Length-and-distance -> SOLUTION: points M and N are the mid-points of AC and BC, respectively. Show that d(MN) = 1/2[d(AB)] C(b,c) A(0,0) B(a,0)       Log On


   



Question 1021728: points M and N are the mid-points of AC and BC, respectively. Show that d(MN) = 1/2[d(AB)]
C(b,c) A(0,0) B(a,0)

Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
If M is the midpoint of AC then it would have coordinates (b/2, c/2) by a direct application of the midpoint formula of analytic geometry. In the same way, if N is the midpoint of BC then it would have the coordinates (%28a%2Bb%29%2F2, c/2).
==> d(MN) =
Also,
d(AB) = sqrt%28+%28a-0%29%5E2%2B+%280-0%29%5E2%29+=+abs%28a%29
==> d%28MN%29+=+d%28AB%29%2F2