Finding angles Intersecting lines are lines that cross each other. Parallel lines are lines that never cross each other - they keep the same distance apart from each other.

If you need to rip wood, then the Speed Square can be an asset as well. Because of its lipped fence you can make a straight line the length of the board. It features ¼-inch incre ...

The cafe wall optical illusion posted on Twitter challenges people to figure out if the lines are straight or bend at an angle.