1. Rhombus   ray   rhombus   straight line   convex   Hint Half-n-half Clue   2. Prisma   concave   prism   heptagon   perpendicular lines   Half-n-half Clue   3. Pyramide   pentagon   edge   pyramid   concave   Half-n-half Clue   4. Viereck   rhombus   quadrangle   prism   perpendicular lines   Half-n-half Clue   5. Pentagon   ray   segment   perpendicular lines   pentagon   Half-n-half Clue   6. gerade Gerade   quadrilateral   perpendicular lines   straight line   parallel lines   Half-n-half Clue   7. Segment   segment   parallelogram   prism   ellipse   Half-n-half Clue