On the one hand the words are descriptive. That is a description of the line. But the evaluative 'right' lurks in the background of right angles. It is just a fact that an angle is a right angle, but it is also a 'right' angle, a good one. But they also put the teeth right, make them better.
Orthopaedic surgeons straighten bones.
Orthopsychiatry is the study of mental disorders chiefly in children. It aims at making the child-normal. Then a new vector is formed by joining the origin of X,Y and the other end of Y's parallel. That's why vector subtraction can help to do away with collinearity. Second, let's talk about projection.