1. parallelogram   linea retta   prisma   parallelogramma   ellisse   Hint Half-n-half Clue   2. vertex   piramide   ellisse   quadrangolo   vertice   Half-n-half Clue   3. plane   ellisse   quadrilateral   piano   quadrangolo   Half-n-half Clue   4. polygon   emisfero   linee parallele   esagono   poligono   Half-n-half Clue   5. ellipse   concavo   ellisse   raggio   vertice   Half-n-half Clue   6. prism   prisma   pentagono   quadrangolo   linee parallele   Half-n-half Clue   7. hemisphere   emisfero   raggio   quadrilateral   losanga   Half-n-half Clue