1. cuadrilátero   perpendicular lines   quadrilateral   concave   vertex   Hint Half-n-half Clue   2. polígono   segment   parallelogram   plane   polygon   Half-n-half Clue   3. óvalo   plane   oval   segment   concave   Half-n-half Clue   4. prisma   hemisphere   quadrilateral   prism   heptagon   Half-n-half Clue   5. heptágono   edge   heptagon   concave   pyramid   Half-n-half Clue   6. hexágono   hexagon   segment   ellipse   pentagon   Half-n-half Clue   7. convexo   convex   oval   perpendicular lines   ray   Half-n-half Clue