Co-ordinate geometry

Co-ordinate geometry

1. Quadrants

   • Plane is divided into 4 parts
     • There are 4 quadrants:-
       • 1st quadrant (+,+) eg-2,3
         • 2nd quadrant (-,+) eg: -2,3
           • 3rd quadrant(-,-) eg: -2,-3
             • 4th quadrant (+,-) eg: 2,-3

2. Cartesian system

   • It means to describe the position of a point in a line.
   • Fixed point
     • Points where x and y axis intersect O,(0,0)

3. Two perpendicular lines

   • X- axis
     • Abscissa
   • Y - axis
     • Ordinate

4. Plotting a point in a plane

   • At first we have to draw co-ordinate axis and then we have to select units.
     • Starting from origin we need to count units on x and y axis
       • We have to mark the corresponding points on the graph