1. rayon   ellipse   ray   heptagon   parallelogram   Hint Half-n-half Clue   2. parallélogramme   parallel lines   quadrangle   straight line   parallelogram   Half-n-half Clue   3. polygone   hexagon   ray   pentagon   polygon   Half-n-half Clue   4. losange   rhombus   pyramid   parallel lines   edge   Half-n-half Clue   5. lignes perpendiculaires   perpendicular lines   convex   pentagon   plane   Half-n-half Clue   6. ellipse   oval   ellipse   plane   heptagon   Half-n-half Clue   7. plat   straight line   plane   ellipse   hexagon   Half-n-half Clue