1. えんとう、   diameter   rectangle   cube   cylinder   Hint Half-n-half Clue   2. めんせき   area   cube   triangle   sphere   Half-n-half Clue   3. せん   square   line   cone   semicircle   Half-n-half Clue   4. くけい   rectangle   diameter   angle   cube   Half-n-half Clue   5. しかくけい   perimeter   diameter   square   side   Half-n-half Clue   6. さんじょう、りっぽうたい   angle   perimeter   cube   area   Half-n-half Clue   7. ちょっけい   radius   cylinder   diameter   cube   Half-n-half Clue