Question

The point (­1, – 2, – 3) lies in

• A. 6^th octant
• B. 5^rd octant
• C. 7^th octant
• D. 8^th octant

Answer 1

The correct option is C

7^th octant

The three coordinate planes divide the space into eight parts known as octants. These octants could be named as XOYZ, X′OYZ, X′OY′Z, XOY′Z, XOYZ′, X′OYZ′, X′OY′Z′ and XOY′Z′ and denoted by I, II, III, ..., VIII, respectively.

So, the point (–1, –2, –3) lies in X’OY’Z’ i.e. 7^th octant.