Class IX Math NCERT Solution for Coordinate Geometry 3.2

Exercise 3.2 (Page 60)
1.  Write the answer of each of the following questions:
          (i) What is the name of horizontal and the vertical lines drawn to determine the position of any point in the Cartesian plane?
          (ii) What is the name of each part of the plane formed by these two lines?
          (iii) Write the name of the point where these two lines intersect.
Ans. (i) The horizontal line: x-axis
                The vertical line: y-axis
          (ii) Each part is called: Quadrant
          (iii) Origin
2.  See the figure given below and write the following:
          (i) The co-ordinates of B.
          (ii) The co-ordinates of C.
          (iii) The point identified by the co-ordinates (–3, –5).
          (iv) The point identified by the co-ordinates (2, –4).
          (v) The abscissa of the point D.
          (vi) The ordinate of the point H.
          (vii) The co-ordinates of the point L.
          (viii) The co-ordinates of the point M.
Ans. From the figure, we have
          (i) The co-ordinates of B are (–5, 2).
          (ii) The co-ordinates of C are (5, –5).
          (iii) The point E is identified by the
                      co-ordinates (–3, –5)
          (iv) The point G is identified by the
                      co-ordinates (2, –4).
          (v) The abscissa of the point D is 6.
          (vi) The ordinate of the point H is –3.
          (vii) The co-ordinates of the point L are (0, 5).
          (viii) The co-ordinates of the point M are (–3, 0).

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