Question

Fill in the blanks:

Answer 1

Figure 1

( i )

From the above figure, it can be seen that x -axis and y -axis taken together determine a plane known as XY plane.

( ii )

Any point in space can be represented with the help of three points ( x,y,z ) , where x , y and z represent its distance from the origin along the x , y and z -axis respectively.

Since the given point lies in the XY plane, its distance from the origin along the z -axis is zero.

Therefore, the coordinates of the given point are of the form ( x,y,0 ) ,

Figure 2

( iii )

From the above figure it can be seen that the coordinate planes divide the space into 8 octants.