To draw a line segment perpendicular to xy passing through point x
and i need with all of it plz me

What does perpendicular mean? Well, in elementary geometry it mean 2 lines that intersect at a right angle. (90°).

So for Part one. all you need to do is draw a straight line down from the point X. Name the end point of that line M. 

Now you will connect the line M and Z.

Thats it! I hope this helped!! :)

First, draw a line from X and call it M. Then connect M to Z.