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˚).

Fantastic new math-based buildings popped up around Sara Harp Minter Elementary when students designed Geometry City.

If you are working at Higher tier, make sure you are confident with dividing fractions to work with gradients of perpendicular lines. To show that two lines are parallel, they must have the same ...