1. sfera   circle   sphere   cube   radius   Hint Half-n-half Clue   2. quadrato   square   side   triangle   sphere   Half-n-half Clue   3. rettangolo   rectangle   cube   cylinder   volume   Half-n-half Clue   4. triangolo   square   sphere   diameter   triangle   Half-n-half Clue   5. circonferenza   circumference   area   cone   point   Half-n-half Clue   6. cerchio   perimeter   volume   side   circle   Half-n-half Clue   7. volume   line   semicircle   volume   diameter   Half-n-half Clue