Introduction To Three Dimensional Geometry

Length of the diagonal
Now.




( length cannot be negative)

Let the point on x-axis is
According to the question,





Hence, required point is .

Let be the ratio in which ZX-plane divides the line segment AB. Day By section formula

For ZX-plane Cording of



Hence, ZX-plane i.e., point P divides the line segment AB in the ratio externally.