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.

Solution:

(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).

(iii) Coordinate planes divide the space into eight octants

NCERT Solutions Class 11 Maths Chapter 12 Exercise 12.1 Question 4

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 ______.

Summary:

(i) XY plane.
(ii) (x, y, 0).
(iii) eight.