A: Shang
A puzzle with other mathematical terms attached:
Puzzle: one yuan (mathematical term)
Answer: percentage
Puzzle: Test scores (guess two math nouns)
Answer: fraction, geometry
Puzzle: The road is not curved (mathematical term)
A: Naoko
Puzzle: The kite has escaped (mathematical term)
Answer: Line segment
Puzzle: the highest peak (mathematical term)
Answer: Vertex
Puzzle: sitting (mathematical term)
Answer: carry
Puzzle: Go hand in hand (mathematical term)
Answer: parallel
Puzzle: Abolish the Law (Mathematical Noun)