NCERT Solutions for Class 9 Maths Chapter 3 Coordinate Geometry
Written by Team Trustudies
Updated at 2021-05-07
NCERT solutions for class 9 Maths Chapter 3 Coordinate Geometry Exercise 3.1
NCERT Solutions for Class 9 Maths Chapter 3 Coordinate Geometry
Answer :
Let us consider the lamp as a point A and table as a plane.
Take any two perpendicular edges of the table. Measure the distance of the lamp from the longer edge AD (denoting y-axis), let it be 25 cm.
Again, measure the distance of the lamp from the shorter edge AB (denoting x-axis);
let it be 15 cm. Therefore, the position of the lamp can be written as (15, 25).
Q2 )
(Street Plan) A city has two main roads which cross each other at the centre of the city.
These two roads are along the North-South direction and East-West direction. All the other streets of
the city run parallel to these roads and are 200 m apart.
There are 5 streets in each direction. Using 1cm = 200 m, draw a model of the city on your notebook.
Represent the roads/streets by single lines.There are many cross-streets in your model.
A particular cross-street is made by two streets, one
running in the North-South direction and another in the East-West direction.
Each cross-street is
referred to in the following manner: If the 2nd street running in the North-South direction and 5th in
the East-west direction meet at some crossing, then we will call this cross-street (2 , 5).
Using this
convention, find
(i) How many cross-streets can be referred to as (4, 3).
(ii) How many cross-streets can be referred to as (3, 4).
NCERT Solutions for Class 9 Maths Chapter 3 Coordinate Geometry
Answer :
The street plan is shown by the following figure.
(i) There is only one cross-street which could be referred to as (4, 3).
(ii) There is only one cross-street which could be referred to as (3, 4).
