Orgin is the intersection of horizontal and vertical number lines.
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vertical lines run from top to bottom, horizontal lines run from left to right the difference between the two is 90 degrees if you place vertical lines next to horizontal lines.
gridlines
It already is. If you extend the vertical and horizontal lines out farther, you'll see that it forms an intersection that is perpendicular. Forming four 90 degree angles.
Vertical, horizontal, and all others, sometimes called skewed.
Perpendicular if they form right angles if not they form vertical opposite equal angles