Question

Question 2 A point is in the XZ-plane. What can you say about its y-coordinate?

Class X1 - Maths -Introduction to Three Dimensional Geometry Page 271

Answer 1

any point on the XZ - plane will have the co-ordinate ( x ,0, z ) because z - co-ordinate will be zero in XZ - plane .
hence, y- co-ordinate is zero .