Fill in the blanks:
(i)   The x–axis and y–axis taken together determine a plane known as____
(ii)The coordinates of points in the XY–plane are of the form_____
(iii)Coordinate planes divide the space into ____ octants____

Explanation

(i) The x-axis and y-axis taken together determine a plane known as XY-plane

(ii) The coordinates of points in the XY-plane are of the form `(x,y,0)`, where x is x-coordinate and y is y-coordinate

(iii) Coordinate planes divide the space into 8 octants.