1. cerchio   semicircle   circle   triangle   circumference   Hint Half-n-half Clue   2. diametro   area   line   perimeter   diameter   Half-n-half Clue   3. perimetro   sphere   point   side   perimeter   Half-n-half Clue   4. superficie   triangle   point   area   circumference   Half-n-half Clue   5. linea   circle   semicircle   radius   line   Half-n-half Clue   6. quadrato   line   square   diameter   perimeter   Half-n-half Clue   7. semicerchio   point   triangle   curve   semicircle   Half-n-half Clue