1. prisme   hexagon   prism   parallel lines   segment   Hint Half-n-half Clue   2. ellipse   hexagon   ellipse   pyramid   heptagon   Half-n-half Clue   3. hexagone   concave   segment   hexagon   hemisphere   Half-n-half Clue   4. segment   hexagon   polygon   segment   prism   Half-n-half Clue   5. convexe   ellipse   edge   ray   convex   Half-n-half Clue   6. hémisphère   hemisphere   plane   parallelogram   ellipse   Half-n-half Clue   7. concave   parallel lines   ellipse   concave   perpendicular lines   Half-n-half Clue