1. Konkav   rhombus   parallelogram   concave   straight line   Hint Half-n-half Clue   2. Parallelogramm   parallel lines   pentagon   heptagon   parallelogram   Half-n-half Clue   3. Rhombus   ray   concave   vertex   rhombus   Half-n-half Clue   4. Hemisphäre   quadrangle   hemisphere   quadrilateral   pentagon   Half-n-half Clue   5. Viereck   parallelogram   hemisphere   quadrangle   oval   Half-n-half Clue   6. flach   plane   oval   straight line   pyramid   Half-n-half Clue   7. oval   hemisphere   straight line   oval   parallelogram   Half-n-half Clue