Students can Download Class 9 Maths Chapter 9 Coordinate Geometry Ex 9.1 Questions and Answers, Notes Pdf, KSEEB Solutions for Class 9 Maths helps you to revise the complete Karnataka State Board Syllabus and to clear all their doubts, score well in final exams.
Karnataka State Syllabus Class 9 Maths Chapter 9 Coordinate Geometry Ex 9.1
Question 1.
How will you describe the position of a table lamp on your study table to another person?
Solution:
Length of study table = 100 cm.
Breadth = 60 cm.
Scale : 10 cm = 1 row
Length of table 100 cm = 10 column.
Breadth 60 cm = 6 rows.
Consider that the lamp ¡s placed on the table, choose two adjacent edges DC and AD. Then, draw perpendicu1lars on the edges DC and AD from the position of lamp and measure the lengths of these perpendiculars. Let the length of these perpendiculars be 20cm and 10cm respectively. Now, the position of the lamp from the left edge (AD) is 10cm and from the lower edge CD is 20cm. This can also be written as (10, 20) where 10 represents the perpendicular distance of the lamp from edge AD and 20 represents the perpendicular distance of the lamp from edge DC.
Question 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 m apart. There are 5 streets in each direction. Using 1 cm = 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:
Scale : 200 m = 1 cm.
Street plan is as shown in the figure:
(i) There is only one cross-street, which can be referred as (4, 3).
(ii) There is only one cross-street, which can be referred as (3, 4).