1. ligne droite   prism   straight line   segment   quadrilateral   Hint Half-n-half Clue   2. hexagone   quadrilateral   pyramid   parallel lines   hexagon   Half-n-half Clue   3. plat   heptagon   perpendicular lines   plane   polygon   Half-n-half Clue   4. polygone   plane   polygon   straight line   quadrilateral   Half-n-half Clue   5. convexe   convex   quadrangle   hemisphere   pentagon   Half-n-half Clue   6. losange   vertex   pentagon   prism   rhombus   Half-n-half Clue   7. lignes perpendiculaires   perpendicular lines   prism   parallel lines   pyramid   Half-n-half Clue