Question

Name the octant in which each of the following points lies.

(i) (1, 2, 3),

(ii) (4, – 2, 3), 

(iii) (4, –2, –5)

(iv) (4, 2, –5)

(v) (– 4, 2, 5)

(vi) (–3, –1, 6) 

(vii) (2, – 4, – 7) 

(viii) (– 4, 2, – 5).

Answer 1

We know that the sign of the coordinates of a point determine the octant in which the point lies. The following table shows the signs of the coordinates in eight octants