COORDINATE GEOMETRY

COORDINATE GEOMETRY

1. THE CARTESIAN PLANE IS DIVIDED INTO 4 REGONS CALLED QUADRANTS BY THE HORIZONTAL X AXIS AND THE VERTICAL Y AXIS.THR FIRST,SECOND,THIRD AND FOURTH QUADRANTS HAVE (+,+),( -,+),(-,- ),(+,-) SIGN CONVENTIONS RESPECTIVELY. THE ORIGIN IS THE INTERSECTION POINT OF THE COORDINATE AXES. ITS COORDINATES ARE (0,0)

2. THE PERPENDICULAR DISTANCE OF "P" FROM Y AXIS IS X1 WHILE THAT FROM THE X AXIS IS Y1.HERE,X1 WHICH IS THE X COORDINATE IS KNOWN AS ABSCISSA AND Y1 i.e. THE Y COORDINATE IS KNOWN AS ORDINATE.

3. IF X >0 AND Y>0,THEN P LIES IN THE FIRST QUADRANT.IF X<0 AND Y>O, P LIES IN THE SECOND QUADRANT. IF X<0 AND Y<0, P LIES IN THE THIRD QUADRANT. IF X>0 AND Y<0. P LIES IN THE FOURTH QUADRANT.

4. ANY POINT ON THE X AXIS HAS COORDINATES (X,0) WHILE ANY POINT PRESENT ON THE Y AXIS HAS COORDINATES (0,Y).

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