Class 09 To find the values of abscissca and ordinates of various points given in a cartesian plane.

 Activity 11

  OBJECTIVE                                                                   

To find the values of abscissca and ordinates of various points given in a cartesian plane.

  MATERIAL REQUIRED

 

Cardboard, white paper, graph paper with various given points, geometry box, pen/pencil.

 METHOD OF CONSTRUCTION

 1.   Take a cardboard of a convenient size and paste a white paper on it.

 2.    Paste the given graph paper alongwith various points drawn on it [see Fig. 1].

 3.   Look at the graph paper and the points whose abcissae and ordinates are to be found.

 DEMONSTRATION

 To find abscissa and ordinate of a point, say A, draw perpendiculars AM and AN from A to x-axis and y-axis, respectively. Then abscissa of A is OM and ordinate of A is ON. Here, OM = 2 and AM = ON = 9. The point A is in first quadrant. Coordinates of A are (2, 9)

OBSERVATION

 

Point

Abscissa

Ordinate

Quadrant

Coordinates

 

B

 

C

 

...

 

...

 

...

 

...

		PRECAUTION
	Fig. 1	The students should be careful
APPLICATION		while reading the coordinates,

 

This activity is helpful in locating the position	otherwise the location of the
	object will differ.

of a particular city/place or country on map