1. ellipse   concavo   ellisse   linee parallele   losanga   Hint Half-n-half Clue   2. pyramid   linee perpendicolari   pentagono   piramide   linee parallele   Half-n-half Clue   3. polygon   bordo   ovale   quadrilateral   poligono   Half-n-half Clue   4. ray   raggio   vertice   losanga   quadrilateral   Half-n-half Clue   5. hemisphere   esagono   quadrilateral   linee parallele   emisfero   Half-n-half Clue   6. hexagon   parallelogramma   ovale   segmento   esagono   Half-n-half Clue   7. straight line   prisma   pentagono   konvex   linea retta   Half-n-half Clue