Why is it important to be careful of the order of the two letters used when naming a ray?

Question

asked Jun 27, 2022 150k views

1 Answer

Hsm · Answer 1 · 2022-07-04T06:43:42+0000

Answer:

Because one letter represents an endpoint and the other doesn't.

Explanation:

Ray AB starts at endpoint A and goes through point B and then on, indefinitely.

Ray BA starts at endpoint B and goes through point A and then on, indefinitely.

They 'point' in opposite directions.