NCERT Class 9 Mathematics
COORDINATE GEOMETRY 53 Fig. 3.3 In the discussion above, you observe that position of any object lying in a plane can be represe ...
54 MATHEMATICS All the other streets of the city run parallel to these roads and are 200 m apart. There are about 5 streets in e ...
COORDINATE GEOMETRY 55 these two lines to locate a point in a plane in this chapter, one line will be horizontal and the other w ...
56 MATHEMATICS You observe that the axes (plural of the word ‘axis’) divide the plane into four parts. These four parts are call ...
COORDINATE GEOMETRY 57 (iii)The perpendicular distance of the point Q from the y - axis measured along the negative direction of ...
58 MATHEMATICS Fig. 3.11 Solution : (i) Since the distance of the point B from the y - axis is 4 units, the x - coordinate or ab ...
COORDINATE GEOMETRY 59 Example 2 : Write the coordinates of the points marked on the axes in Fig. 3.12. Solution : You can see t ...
60 MATHEMATICS Fig. 3.13 Remark : The system we have discussed above for describing a point in a plane is only a convention, whi ...
COORDINATE GEOMETRY 61 (iv)The point identified by the coordinates (2, – 4). (v) The abscissa of the point D. (vi)The ordinate o ...
62 MATHEMATICS distance of this point from the y - axis along the positive x - axis is 3 units and the distance of the point fro ...
COORDINATE GEOMETRY 63 Fig. 3.16 Note : In the example above, you see that (5, 0) and (0, 5) are not at the same position. Simil ...
64 MATHEMATICS Solution : The pairs of numbers given in the table can be represented by the points (– 3, 7), (0, –3.5), (– 1, – ...
COORDINATE GEOMETRY 65 counter moves on to a point already occupied by the counter of the second player, then the second player’ ...
CHAPTER 4 LINEAR EQUATIONS IN TWO VARIABLES The principal use of the Analytic Art is to bring Mathematical Problems to Equations ...
LINEAR EQUATIONS IN TWO VARIABLES 67 While solving an equation, you must always keep the following points in mind: The solution ...
68 MATHEMATICS (iv) The equation 2x = y can be written as 2x – y + 0 = 0. Here a = 2, b = –1 and c = 0. Equations of the type ax ...
LINEAR EQUATIONS IN TWO VARIABLES 69 On the other hand, (1, 4) is not a solution of 2x + 3y = 12, because on putting x = 1 and y ...
70 MATHEMATICS Now, if you take y = 0, you again get (0, 0) as a solution, which is the same as the earlier one. To get another ...
LINEAR EQUATIONS IN TWO VARIABLES 71 In the previous chapter, you studied how to plot the points on a graph paper. Let us plot t ...
72 MATHEMATICS are satisfied by the coordinates of the point (1, 2). Can you see this pictorially? Example 6 : Draw the graph of ...
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