1. rettangolo   diameter   rectangle   line   triangle   Hint Half-n-half Clue   2. angolo   radius   angle   point   diameter   Half-n-half Clue   3. superficie   point   area   triangle   square   Half-n-half Clue   4. perimetro   sphere   perimeter   radius   semicircle   Half-n-half Clue   5. sfera   side   sphere   semicircle   area   Half-n-half Clue   6. curva   side   curve   square   radius   Half-n-half Clue   7. semicerchio   cube   volume   triangle   semicircle   Half-n-half Clue