What vector describes the translation from triangle TRI to triangle TRT?

Early in the story when tom finds an indian skull in the woods which he kicks in temper. the devil then makes his appearance and, as tom surveys him, he notices that the devil is neither "negro" nor "indian." in fact, he has a "swarthy" complexion and is "begrimed with soot."

Answerscripps institution of oceanography; i believe this is correct plz check first good luck;