1. Viereck   parallelogram   quadrilateral   hemisphere   hexagon   Hint Half-n-half Clue   2. Segment   ellipse   quadrangle   vertex   segment   Half-n-half Clue   3. Kante   edge   hemisphere   polygon   perpendicular lines   Half-n-half Clue   4. Viereck   quadrangle   polygon   straight line   parallel lines   Half-n-half Clue   5. Hemisphäre   perpendicular lines   oval   prism   hemisphere   Half-n-half Clue   6. Konkav   vertex   concave   ray   parallelogram   Half-n-half Clue   7. gerade Gerade   pentagon   pyramid   quadrangle   straight line   Half-n-half Clue