NCERT Solutions Class 9th Maths Chapter – 3 Coordinate Geometry Examples

NCERT Solutions Class 9th Maths Chapter – 3 Coordinate Geometry Examples
Last Doubt

NCERT Solutions Class 9th Maths Chapter – 3 Coordinate Geometry

TextbookNCERT
Class9th
SubjectMathematics
Chapter3rd
Chapter NameCoordinate Geometry
CategoryClass 9th Mathematics
Medium English
SourceLast Doubt

NCERT Solutions Class 9th Maths Chapter – 3 Coordinate Geometry

Chapter – 3

Coordinate Geometry

Examples

Example 1 : See Fig. 3.11 and complete the following statements:
(i) The abscissa and the ordinate of the point B are _ _ _ and _ _ _, respectively. Hence, the coordinates of B are (_ _, _ _).
(ii) The x-coordinate and the y-coordinate of the point M are _ _ _ and _ _ _, respectively. Hence, the coordinates of M are (_ _, _ _).
(iii) The x-coordinate and the y-coordinate of the point L are _ _ _ and _ _ _, respectively. Hence, the coordinates of L are (_ _, _ _).
(iv) The x-coordinate and the y-coordinate of the point S are _ _ _ and _ _ _, respectively. Hence, the coordinates of S are (_ _, _ _).

Solution – (i) Since the distance of the point B from the y – axis is 4 units, the x – coordinate or abscissa of the point B is 4. The distance of the point B from the x – axis is 3 units; therefore, the y – coordinate, i.e., the ordinate, of the point B is 3.
Hence, the coordinates of the point B are (4, 3).
As in (i) above –
(ii) The x – coordinate and the y – coordinate of the point M are –3 and 4, respectively. Hence, the coordinates of the point M are (–3, 4).
(iii) The x – coordinate and the y – coordinate of the point L are –5 and – 4, respectively. Hence, the coordinates of the point L are (–5, – 4).
(iv) The x – coordinate and the y- coordinate of the point S are 3 and – 4, respectively. Hence, the coordinates of the point S are (3, – 4).

Example 2 : Write the coordinates of the points marked on the axes in Fig. 3.12.

Solution – You can see that :
(i) The point A is at a distance of + 4 units from the y – axis and at a distance zero from the x – axis. Therefore, the
x – coordinate of A is 4 and the
y – coordinate is 0. Hence, the
coordinates of A are (4, 0).
(ii) The coordinates of B are (0, 3). Why?
(iii) The coordinates of C are (– 5, 0).Why?
(iv) The coordinates of D are (0, – 4). Why?
(v) The coordinates of E are (2/3, 0) Why?

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