up and down
Vertical lines go up and down. Horizontal lines go left to right.
vertical
Vertical lines are lines that are drawn / made perpendicular to the horizon. In other words, they go "ceiling to floor", not "wall to wall" or "corner to corner."
Because they only go in one (1) direction.
Vertical goes up and down.
Yes. Longitude lines on a map are vertical and latitude lines are horizontal. But it could be the other way around too. It depends on how you hold your map.
Non-vertical lines could be slanted or horizontal.
They are simply just called lines.
No. Horizontal lines have zero slope. Vertical lines have infinite slope.
Vertical lines parallel to the prime meridian are lines of longitude.
No. The non-vertical angles need not be related to one another in any way.
7 horizontal lines and 10 vertical lines how many rectangles?