1. ellisse   plane   pyramid   edge   ellipse   Hint Half-n-half Clue   2. konvex   rhombus   straight line   convex   ray   Half-n-half Clue   3. emisfero   straight line   hemisphere   pyramid   prism   Half-n-half Clue   4. concavo   perpendicular lines   concave   ellipse   pentagon   Half-n-half Clue   5. losanga   perpendicular lines   prism   polygon   rhombus   Half-n-half Clue   6. linee perpendicolari   perpendicular lines   parallel lines   pyramid   oval   Half-n-half Clue   7. bordo   parallelogram   pentagon   prism   edge   Half-n-half Clue