1. perimetro   curve   perimeter   circle   point   Hint Half-n-half Clue   2. superficie   cylinder   volume   perimeter   area   Half-n-half Clue   3. curva   diameter   curve   radius   point   Half-n-half Clue   4. cilindro   area   triangle   cylinder   cone   Half-n-half Clue   5. sfera   sphere   semicircle   line   triangle   Half-n-half Clue   6. angolo   angle   volume   semicircle   sphere   Half-n-half Clue   7. diametro   diameter   semicircle   sphere   curve   Half-n-half Clue