 Hello friends, let's work out the following problem. It says a point is in the x-z plane What can you say about its y-coordinate? We shall solve this problem keeping in mind the following fundamental Concepts of the three-dimensional geometry the first one is coordinates of a point in y-z plane will be 0 y z So here we are given a point in the y-z plane then its coordinates will be 0 y z where y is The distance of the point From the origin on the y-axis. So this much distance is y and Z is the distance of the point from the origin on the z-axis and this much distance is Z and your x-coordinate is 0 similarly the coordinates of a point in the x-z plane will be x Z that is the y-coordinate is 0 We are given a point in the x-z plane somewhere here So the coordinates of this point will be x 0 Z where x is the distance of the point from the origin on the x-axis and Z is the distance of the point from the origin on z-axis similarly The coordinates point x y plane x y 0 This knowledge will work as key idea to know the Fundamental facts of the three-dimensional geometry so the answer to this question is The y-coordinate will be 0 because the point lies in the x-z plane So from the second key idea the y-coordinate is 0 and This completes the question by for now take care. Have a good day