Coordinate geometry describes the position of points on a plane using an ordered pair of numbers (x, y). It was developed by French mathematician René Descartes in the 1600s. The system uses two perpendicular axes (the x-axis and y-axis) that intersect at the origin point (0,0). Values to the right of the x-axis and above the y-axis are positive, while values to the left and below are negative. The plane is divided into four quadrants by these axes.

1. Coordinate Geometry
Anju Soman
Roll no. 90
B.Ed (2014-2015)

2. What is Coordinate Geometry?
A system of
geometry where
the position of
points on the plane
is described using
an ordered pair of
numbers.

3. French Mathematician René Descartes
(1596 - 1650).

4. It has two scales - one
running across the plane
called the "x axis" and
another a right angles to
it called the “y axis”.
The point where the
axes cross is called the
“Origin” and is where
both x and y are zero.

5. On the x-axis, values
to the right are
positive and those to
the left are negative.
On the y-axis, values
above the origin are
positive and those
below are negative.

6. X- axis
Y- axis
X- axis
Y- axis
St Quadrantnd Quadrant
rd Quadrant th Quadrant

7. X- axisX- axis O
Y- axis
Y- axis
(-3,-2) The abscissa is the x-coordinate of a
point on the coordinate plane.
The distance along the horizontal
axis.

8. X- axisX- axis O
Y- axis
Y- axis
(-3,-2)
The y-coordinate of a point on
the coordinate plane : its distance
from the x-axis measured parallel
to the y-axis.

10. Q:1 How many Quadrants are
there?
3 Quadrants
7 Quadrants
6 Quadrants
1.
2.
3.
4.
4 Quadrants

12. Try
Again….

13. X- axis
X- axis O
Y- axis
Y- axis
1. On Y- axis
2. In the IVth quadrant
3. In the IInd quadrant
4. On X- axis

15. Try Again….

16. 1. X- axis
2. Y- axis
3. Il nd quadrant
4. III rd quadrant

18. Try Again….

19. X- axisX- axis O
Y- axis
Y- axis
(-3,-2)
Q: 4 Find the Ordinate in (-3, -2)
1. -3 is ordinate
2. -2 is ordinate
3. (-3, -2) is ordinate
4. Non of the above

21. Try Again….

22. X- axisX- axis O
Y- axis
Y- axis
(-3,-2)
Q: 5 Find the Abscissa in (-3, -2)
4. -3 is Abscissa
3. -2 is Abscissa
1 . (-3, -2) is Abscissa
2. Abscissa is 4th quadrant

24. Try Again….