1. 側   circle   perimeter   side   square   Hint Half-n-half Clue   2. 面積   area   rectangle   line   cone   Half-n-half Clue   3. 球   perimeter   sphere   cylinder   circle   Half-n-half Clue   4. 円、丸　   semicircle   side   circle   sphere   Half-n-half Clue   5. 円筒,　   diameter   point   cube   cylinder   Half-n-half Clue   6. 円周   triangle   circle   cylinder   circumference   Half-n-half Clue   7. 三角形   triangle   circumference   curve   point   Half-n-half Clue