When naming a ray the order of the letters matters?

Answer 1

Yes. If your ray's endpoint is the letter A and it goes on forever in the direction of the letter B, that is not the same as a ray that starts at the letter B and goes on forever in the direction of the letter A.

So always name your ray starting with the endpoint letter.

Answer 2

Yes, the order of the letters matters when naming a ray. The naming convention for a ray typically involves a starting point followed by a letter that denotes the direction in which the ray extends.