However, for the lines to be parallel, the distance between the lines always stays the same. Perpendicular lines meet at a right angle. A right angle is a quarter turn, which is 90 degrees (90˚).

What a race. Well run you two. Oh, here we go. You drawing your own lines now, are you? Come on don't be a sore loser. Perpendicular lines cross at right angles. That's why they're not used in ...