1. 面積   cone   side   area   circle   Hint Half-n-half Clue   2. 四角形   cylinder   rectangle   square   cone   Half-n-half Clue   3. 円、丸　   diameter   line   circle   cube   Half-n-half Clue   4. 側   circle   sphere   side   rectangle   Half-n-half Clue   5. 三角形   perimeter   line   triangle   circumference   Half-n-half Clue   6. 半径   perimeter   square   radius   circumference   Half-n-half Clue   7. 角   point   angle   square   radius   Half-n-half Clue