1. prisme   straight line   prism   plane   ellipse   Hint Half-n-half Clue   2. ligne droite   concave   prism   straight line   segment   Half-n-half Clue   3. quadrilatère   straight line   vertex   ray   quadrilateral   Half-n-half Clue   4. plat   parallelogram   polygon   plane   pyramid   Half-n-half Clue   5. losange   pentagon   plane   quadrangle   rhombus   Half-n-half Clue   6. segment   segment   ray   oval   pyramid   Half-n-half Clue   7. concave   vertex   heptagon   concave   prism   Half-n-half Clue