1. polygone   convex   polygon   oval   hemisphere   Hint Half-n-half Clue   2. prisme   oval   segment   perpendicular lines   prism   Half-n-half Clue   3. losange   ellipse   parallel lines   rhombus   heptagon   Half-n-half Clue   4. sommet   segment   straight line   edge   vertex   Half-n-half Clue   5. pyramide   pyramid   pentagon   vertex   convex   Half-n-half Clue   6. parallélogramme   oval   edge   parallelogram   pyramid   Half-n-half Clue   7. quadrilatère   heptagon   quadrilateral   edge   quadrangle   Half-n-half Clue