Co-ordinate Geometry

Co-ordinate Geometry

1. Cartesian System

   • used for
     • describing the position of a point in a plane.
   • denoted by (x,y)
     • x coordinate is abscissa
     • y coordinate is ordinate
   • developed by Rene Descarates (French Mathematician)
   • divided in
     • 4 quadrants

2. Equation of

   • x axis is y=0
   • x axis is y=constant line parallel to
   • y axis is x=0
   • y axis is x=constant line parallel to

3. Fixed Point

   • is origin (0,0)
     • moving left
       • -ve x axis (-x,0)
     • moving up
       • +ve y axis (0,y)
     • moving right
       • + ve x axis (x,0)
     • moving down
       • -ve y axis (0,-y)

4. requires

   • two perpendicular lines
     • horizontal line
       • x axis
     • vertical line
       • y axis