1. hankei   radius   circumference   circle   triangle   Hint Half-n-half Clue   2. sanjoo、rippoutai   circle   cone   square   cube   Half-n-half Clue   3. entou   rectangle   semicircle   angle   cylinder   Half-n-half Clue   4. sen   cone   cylinder   line   diameter   Half-n-half Clue   5. ten   point   curve   square   perimeter   Half-n-half Clue   6. kukei   cylinder   rectangle   side   curve   Half-n-half Clue   7. hanen   area   semicircle   point   triangle   Half-n-half Clue