Answer
CD shows that the endpoint is at point C and the ray is pointing towards the direction of point D.
DC shows that the endpoint is at point D and the ray is pointing towards the direction of point C.
Work Step by Step
As listed in answer.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.