NCERT Class 9 Math Chapter 3 Coordinate Geometry Exercise 3.1 Solution by Expert Teacher. NCERT Class 9 Math Ex. 3.1 Complete Solution with Pdf for Latest Syllabus 2022 – 23 followed by CBSE.
NCERT Class 9 Math Chapter 3 Coordinate Geometry Exercise 3.1 Solution
EXERCISE 3.1
(1) How will you describe the position of a table lamp on your study table to another person?
Solution:
Position of lamp = (15, 25) or (25, 30)
(2) 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).
Solution:
Cross street (2, 5), (3, 5) & (4; 3) are marked one cross street is referred to 13, 4) & one cross street is referred to (4, 3), Here they are uniquely found.
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Coordinate Geometry