1. Parallelogramm   edge   parallelogram   ray   segment   Hint Half-n-half Clue   2. Rhombus   segment   ray   straight line   rhombus   Half-n-half Clue   3. Konvex   perpendicular lines   vertex   prism   convex   Half-n-half Clue   4. Vieleck   segment   polygon   quadrilateral   vertex   Half-n-half Clue   5. Segment   oval   rhombus   polygon   segment   Half-n-half Clue   6. flach   plane   perpendicular lines   quadrilateral   convex   Half-n-half Clue   7. Viereck   perpendicular lines   quadrangle   concave   straight line   Half-n-half Clue