Coordinate Geometry – Exercise 3.1 – (MATHEMATICS) – 9th Class
TEXTBOOK QUESTIONS SOLVED
1. How will you describe the position of a table lamp on your study table to another person?
2. 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 in apart. There are about 5 streets in each direction. Using 1 cm = 200 in, draw a model of the city on your notebook. Represent the roads I 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 directions. Each cross-street is referred to in the following manner. If the second 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, 7)?