1. 容量   point   area   perimeter   volume   Hint Half-n-half Clue   2. 长方形   cone   circumference   line   rectangle   Half-n-half Clue   3. 立方体   cube   side   line   radius   Half-n-half Clue   4. 角度   cube   angle   sphere   volume   Half-n-half Clue   5. 区域   perimeter   cone   area   side   Half-n-half Clue   6. 曲线   semicircle   curve   triangle   circumference   Half-n-half Clue   7. 线   cone   line   cube   circumference   Half-n-half Clue