1. [ou;qu] yu   circle   cube   circumference   area   Hint Half-n-half Clue   2. yuan zhou   circumference   semicircle   side   perimeter   Half-n-half Clue   3. [juan;juan;quan] zi   volume   rectangle   circle   circumference   Half-n-half Clue   4. yuan tong   angle   triangle   area   cylinder   Half-n-half Clue   5. zhou [chang;zhang]   radius   perimeter   line   square   Half-n-half Clue   6. [bian;bian]   perimeter   point   triangle   side   Half-n-half Clue   7. dian   cube   cylinder   point   curve   Half-n-half Clue