How I understand this:
맞다 has various meanings. But for the benefit of this exercise let's consider
Verb: 맞다 = be correct, right, spot on
맞는 (present) = that is/are right
맞은 (past) = that was/were right
맞음 (generic) = correctness, accuracy
맞기 (physical: act, process of) = the righting (act of being right)
맞지 (mental: notion, concept of) = concept of being right
-지 = the psyche (knowledge, intelligence, wisdom/skills)
(3). V/Adj-지 sentence ending can be used like
• Eng. tag question turning a statement into a negative question. Basically, it is meant to seek agreement/approval from the Listener => Right? Agreed? Isn't/doesn't it? etc.
• Tone softener = Eng. polite command/question => use of "please" or/and auxiliary verb like “could” or “would (you mind)”.
• pause filler => uh, okay. Right...