1. lignes parallèles   parallel lines   perpendicular lines   edge   plane   Hint Half-n-half Clue   2. Heptagon   perpendicular lines   prism   heptagon   parallel lines   Half-n-half Clue   3. hexagone   heptagon   parallelogram   pentagon   hexagon   Half-n-half Clue   4. pyramide   oval   ray   pyramid   rhombus   Half-n-half Clue   5. parallélogramme   ray   parallelogram   straight line   polygon   Half-n-half Clue   6. ellipse   ellipse   ray   perpendicular lines   pyramid   Half-n-half Clue   7. hémisphère   pyramid   hemisphere   parallelogram   edge   Half-n-half Clue