How will you describe the position of a table lamp on your study table to another person?
Solution:
The above figure is a 3-D show of a study table on which a study lamp is placed.
Now let us consider only the top surface of the table, which becomes a 2-D rectangle figure.
From the Figure above,
- Consider the lamp on the table as a point
- Consider the table as a 2-D plane.
The table has a shorter side (20 cm) and a longer side (30 cm).
- Let us measure the distance of the lamp from the shorter and the longer side.
- Let us assume
a) The distance of the lamp from the shorter side is 5 cm.
b) The distance of the lamp from the longer side is 15 cm.
Let's plot this on the cartesian plane as shown below.
Therefore, we can conclude that the position of the lamp on the table can be described with respect to the order of the axes as (5, 15).
☛ Check: NCERT Solutions for Class 9 Maths Chapter 3
Video Solution:
How will you describe the position of a table lamp on your study table to another person?
NCERT Solutions Class 9 Maths Chapter 3 Exercise 3.1 Question 1
Summary:
The position of a table lamp on your study table can be described with respect to the order of the axes as (5, 15) to another person.
☛ Related Questions:
- (Street Plan): A city has two main roads which cross each other at the center 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).
- Write the answer of each of the following questions:(i) What is the name of horizontal and the vertical lines drawn to determine the position of any point in the Cartesian plane?(ii) What is the name of each part of the plane formed by these two lines?(iii) Write the name of the point where these two lines intersect.
- See Fig. 3.14, and write the following:(i) The coordinates of B.(ii) The coordinates of C.(iii) The point identified by the coordinates (-3, -5).(iv) The point identified by the coordinates (2, -4).(v) The abscissa of the point D.(vi) The ordinate of the point H.(vii) The coordinates of the point L.(viii) The coordinates of the point M.