They are kind of if one is going horizontal then the other one will be going vertical. so let me draw with rays first so the right angle this one is going from the left to the right and the other ray is going from the bottom to the top this angle right over here is a right angle and I could label it like that but as a traditional angle but the general, the general convention for labeling right angles is to put a little, a kind of a half of a box over there.