1. diameter   chokkei   maru   sen   kyakusen,　kaabu   Hint Half-n-half Clue   2. square   sen   hankei   kukei   shikakukei   Half-n-half Clue   3. area   gawa   sen   hanen   menseki   Half-n-half Clue   4. cone   shikakukei   kukei   gawa   ensui   Half-n-half Clue   5. line   sankakukei   sen   gawa   ten   Half-n-half Clue   6. circumference   kyuu   chokkei   gawa   enryuu   Half-n-half Clue   7. perimeter   ensui   shuuichou   chokkei   entou   Half-n-half Clue