COORDINATE GEOMETRY : DISTANCE FORMULA...

COORDINATE GEOMETRY..

DISTANCE FORMULA...

http://www.youtube.com/results?search_query=coordinate+geometry+10&oq=coordinate+geometry+10&gs_l=youtube.3..33i21.29302.31351.0.32399.3.3.0.0.0.0.237.687.2-3.3.0...0.0...1ac.1.-jeVSBEbb1s