This is the 17596th most frequent Korean word.
세모인지
"세모인지" refers to something being triangular or uncertain/ambiguous in shape, context, or decision.
In this sentence, '세모인지' is used to inquire if something is triangular in shape, using '인지' as a question suffix meaning 'whether'.
그 모양이 세모인지 확인해 주세요.
Please check if that shape is a triangle.
Here '세모인지' examines if the paper takes a triangular form, reinforcing the inquiry with '인지'.
이 종이가 세모인지 자가 없어?
Don't you have a ruler to see if this paper is triangular?
The phrase '세모인지' is part of a requirement to determine the triangularity of game shapes, showcasing '인지' in a decision-making context.