1. qiu xing   square   radius   sphere   curve   Hint Half-n-half Clue   2. [ou;qu] yu   radius   circumference   circle   area   Half-n-half Clue   3. xian   line   diameter   cylinder   radius   Half-n-half Clue   4. zhou [chang;zhang]   curve   rectangle   perimeter   square   Half-n-half Clue   5. [chang;zhang] fang xing   volume   area   line   rectangle   Half-n-half Clue   6. zhi jing   triangle   diameter   volume   curve   Half-n-half Clue   7. [juan;juan;quan] zi   triangle   cube   radius   circle   Half-n-half Clue