1. rhombus   linee parallele   pentagono   emisfero   losanga   Hint Half-n-half Clue   2. plane   parallelogramma   piano   bordo   raggio   Half-n-half Clue   3. parallel lines   parallelogramma   emisfero   linee parallele   ovale   Half-n-half Clue   4. parallelogram   linea retta   bordo   concavo   parallelogramma   Half-n-half Clue   5. quadrilateral   concavo   raggio   quadrilateral   poligono   Half-n-half Clue   6. perpendicular lines   ovale   linee perpendicolari   emisfero   konvex   Half-n-half Clue   7. concave   quadrangolo   concavo   piramide   ellisse   Half-n-half Clue