1. Strahl   concave   ray   heptagon   parallel lines   Hint Half-n-half Clue   2. Segment   hemisphere   segment   hexagon   quadrilateral   Half-n-half Clue   3. parallele Linien   parallel lines   ellipse   oval   prism   Half-n-half Clue   4. Hemisphäre   concave   quadrilateral   hemisphere   quadrangle   Half-n-half Clue   5. heptágono   convex   parallel lines   straight line   heptagon   Half-n-half Clue   6. Viereck   parallel lines   oval   quadrilateral   polygon   Half-n-half Clue   7. Rhombus   pentagon   oval   rhombus   edge   Half-n-half Clue