Class 9 Maths
Coordinate Geometry
Ex.3.1 Q.1
How will you describe the position of a mobile phone kept on the study table to another person?
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Ex.3.1 Q.2
Street Plan: There are 2 main roads in a city. They intersect each other, at the center of the city.
East-West and North-South are the directions of the two roads.
Rest streets of the city are at 200 m from each other and are parallel to these roads.
There are (five) streets in every direction. Using 1cm = 200 m as scaling unit, draw a model of the city.
Representation of roads/streets will be given by single lines.
A model which has cross streets in which one particular cross street is made by 2 streets in which one running
from North to South direction and the other runs from the East to the West direction.
Each of these cross streets are referred as in the following manner:
Through which the second street runs from the north to the south and the fifth runs from the East to the West
which meets at some crossing, then the cross street that intersect each other will be (2,5).
Using this convention,
Find:
(1) How many cross – streets can be referred to as (4, 3).
(2) How many cross – streets can be referred to as (3, 4).
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Ex.3.2 Q.1
Answer the following questions:
(1) Name the horizontal and the vertical lines drawn to determine the position of any point in the Cartesian plane?
(2) Name each part of the plane formed by the above two lines?
(3) Name the point where these two lines intersect.
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Ex.3.2 Q.2
Answer the following referring to the figure given below:
(1) co-ordinates of B.
(2) co-ordinates of C.
(3) co-ordinates of the point L.
(4) co-ordinates of the point M.
(5) ordinate of the point H.
(6) abscissa of the point D.
(7) The point i.e., identified by the co-ordinates (−3, −5).
(8) The point i.e., identified by the co-ordinates (2, −4).
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Ex.3.3 Q.1
Represent the following points (3, −1), (−2, 4), (1, 2), (−1, 0) and (−3, −5) on a
Cartesian plane and also tell in which quadrant do they lie? Give reason for your answer.
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Ex.3.3 Q.2
Plot the points (x, y) given in the following table on the plane,
choosing suitable units of distance on the axes and also tell in which quadrant or axis does it lies.
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