Co-ordinate Geometry

Co-ordinate Geometry

1. Cartesian System

   • Discovered by Rene Descartes
   • Used for plotting points
   • X-axis and Y-axis
     • X-axis is called abscissa
       • Determine the horizontal distance of a point from the y-axis.
     • Y-axis is called ordinate
       • Determine the vertical distance of a point from the x-axis.
   • contains 4 quadrants
     • 4th Quadrant
       • Here, X co-ordinate= +ve and Y co-ordinate= -ve
     • 3rd Quadrant
       • Here, X co-ordinate= -ve and Y co-ordinate= -ve
     • 1st Quadrant
       • Here, X co-ordinate= +ve and Y co-ordinate= +ve
     • 2nd Quadrant
       • Here, X co-ordinate= -ve and Y co-ordinate= +ve
   • Plotting of points on graph