1. 圓周   semicircle   area   circumference   cube   Hint Half-n-half Clue   2. 圓筒   diameter   cylinder   cone   angle   Half-n-half Clue   3. 球形   angle   point   square   sphere   Half-n-half Clue   4. 直徑   cylinder   diameter   area   semicircle   Half-n-half Clue   5. 錐體   cone   angle   sphere   curve   Half-n-half Clue   6. 點   sphere   circle   area   point   Half-n-half Clue   7. 三角   circle   semicircle   triangle   cube   Half-n-half Clue