Extra Questions Class 9 Maths | Coordinate Geometry Q1

NCERT Chapter 3 | Find the quadrant | Cartesian Plane

Question 1: In which quadrant do the following points lie?
I. (6, 3)
II. (-8, 4)
III. (8, -7)
IV. (-5, -9)


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Explanatory Answer | Chapter 3 Extra Question 1

The table given below provides details about the signs of the abscissa (x-coordinate) and ordinate (y-coordinate) in the four quadrants in the x-y plane.

Quadrant Abscissa
x-coordinate
Ordinate
y-coordinate
I Quadrant + +
II Quadrant (-) +
III Quadrant (-) (-)
IV Quadrant + (-)

(i) (6, 3)
Abscissa (x – cordinate) and ordinate (y – coordinate) are both positive.
Therefore (6, 3) lies in the first quadrant.

(ii) (-8, 4)
Abscissa (x – cordinate) is negative and ordinate (y – coordinate) is positive.
Therefore (-8, 4) lies in the second quadrant.

(iii) (8, -7)
Abscissa (x – cordinate) is positive and ordinate (y – coordinate) is negative.
Therefore (8, -7) lies in the fourth quadrant.

(iv) (-5, -9)
Abscissa (x – cordinate) and ordinate (y – coordinate) are both negative.
Therefore (-5, -9) lies in the third quadrant.


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