1. sankakukei   curve   triangle   circle   cone   Hint Half-n-half Clue   2. menseki   cube   curve   area   semicircle   Half-n-half Clue   3. hankei   radius   diameter   square   circumference   Half-n-half Clue   4. ensui   angle   cylinder   cone   cube   Half-n-half Clue   5. ten   rectangle   point   square   circle   Half-n-half Clue   6. entou   sphere   perimeter   line   cylinder   Half-n-half Clue   7. kukei   rectangle   curve   circumference   diameter   Half-n-half Clue