1. vertice   convex   concave   hemisphere   vertex   Hint Half-n-half Clue   2. linee parallele   parallel lines   concave   perpendicular lines   rhombus   Half-n-half Clue   3. linea retta   straight line   ellipse   convex   ray   Half-n-half Clue   4. segmento   polygon   segment   pyramid   parallel lines   Half-n-half Clue   5. concavo   quadrangle   ray   hemisphere   concave   Half-n-half Clue   6. konvex   oval   edge   convex   segment   Half-n-half Clue   7. poligono   pentagon   convex   polygon   parallel lines   Half-n-half Clue