Class-9 : Maths - Chapter : 3 Co-ordinate Geometry (Ex-3.1 Ex-3.2 Ex-3.3)

Points To Remember 

• Coordinate Geometry : The branch of mathematics in which geometric problems are solved through algebra by using the coordinate system is known as coordinate geometry.

• Coordinate axes: The position of a point in a plane is determined with reference to two fixed mutually perpendicular lines called the coordinate axes.

• Ordered pair : A pair of numbers a and b listed in a specific order with 'a' at the first place

and 'b' at the second place is called an ordered pair (a,b). Note that (a,b) ≠ (b,a) 

• Quadrants: The coordinate axes divide the plane into four parts which are known as quadrants.

From figure

• The horizontal line XOX' is called the X-axis.

• The vertical line YOY is called the Y-axis.

• The point O is called the origin. 

• Any point lying on x-axis or y-axis does not lie in any quadrant.

Using the convention of signs, we have the signs of the coordinates in the various quadrants as given below :

CO-ORDINATES OF A POINT IN A PLANE

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Exercise - 3.1

Exercise - 3.2

Exercise -3.3

To download Ch-3 (Coordinate Geometry) solutions in PDF please click on the link below :

Ex - 3.1 : Download PDF 

Ex - 3.2 : Download PDF 

Ex - 3.3 : Download PDF

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