1. perpendicular lines   Senkrechtlinien   Konkav   Konvex   Segment   Hint Half-n-half Clue   2. concave   Vieleck   Konkav   gerade Gerade   Rhombus   Half-n-half Clue   3. plane   flach   Segment   Viereck   Konkav   Half-n-half Clue   4. segment   oval   Prisma   Segment   Konvex   Half-n-half Clue   5. oval   gerade Gerade   Kante   Pyramide   oval   Half-n-half Clue   6. pentagon   parallele Linien   heptágono   Pyramide   Pentagon   Half-n-half Clue   7. heptagon   Konkav   oval   parallele Linien   heptágono   Half-n-half Clue