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!! :)
70
make 30 minutes into an hour then divide 140 by 2
140/2=70
70x1=70
Well before the descimal its 5,600 after decimal is 0.56