1. 円錐   line   semicircle   area   cone   Hint Half-n-half Clue   2. 三角形   triangle   perimeter   diameter   circle   Half-n-half Clue   3. 三乗、立方体、   curve   cone   radius   cube   Half-n-half Clue   4. 曲線,   curve   circumference   rectangle   diameter   Half-n-half Clue   5. 矩形   rectangle   cube   point   circumference   Half-n-half Clue   6. 球   angle   triangle   circle   sphere   Half-n-half Clue   7. 線　   curve   line   cube   triangle   Half-n-half Clue