Straight lines can be drawn in any direction. Horizontal lines go left and right. Vertical lines go up and down. Parallel lines are a fixed distance apart and will never meet, no matter how long they ...

Whether you are sketching graphs in mathematics, understanding directions in geography, or reading blueprints in design class, horizontal and vertical lines are concepts you cannot avoid. They form ...

The cafe wall optical illusion posted on Twitter challenges people to figure out if the lines are straight or bend at an angle. A myriad of optical illusions keeps us glued to our screens as we keep ...

“This 1990 work on paper from Sol LeWitt is subtle but poignant in the way the artist expresses a central motif of variations on a line as ‘vertical strokes, not straight, not touching.’ It is noted ...

Horizontal lines run left to right, parallel to the horizon, with slope 0 and equation y = k. Vertical lines run top to bottom, perpendicular to the horizon, with undefined slope and equation x = k.