1. Segment   prism   quadrangle   ray   segment   Hint Half-n-half Clue   2. Pyramide   parallelogram   hemisphere   pyramid   concave   Half-n-half Clue   3. Viereck   quadrilateral   prism   perpendicular lines   parallel lines   Half-n-half Clue   4. Pentagon   ray   perpendicular lines   pentagon   hexagon   Half-n-half Clue   5. Parallelogramm   pyramid   edge   convex   parallelogram   Half-n-half Clue   6. parallele Linien   polygon   straight line   edge   parallel lines   Half-n-half Clue   7. Rhombus   polygon   rhombus   parallel lines   pyramid   Half-n-half Clue