1. Prisma   convex   straight line   prism   edge   Hint Half-n-half Clue   2. oval   oval   pyramid   quadrangle   quadrilateral   Half-n-half Clue   3. parallele Linien   parallel lines   quadrilateral   pyramid   convex   Half-n-half Clue   4. heptágono   straight line   heptagon   prism   plane   Half-n-half Clue   5. Hemisphäre   concave   rhombus   hemisphere   edge   Half-n-half Clue   6. Kante   quadrilateral   ellipse   vertex   edge   Half-n-half Clue   7. Hexagon   hexagon   ellipse   pentagon   quadrilateral   Half-n-half Clue