1. cuadrilátero   perpendicular lines   hexagon   heptagon   quadrilateral   Hint Half-n-half Clue   2. pirámide   pyramid   concave   hexagon   straight line   Half-n-half Clue   3. hexágono   parallelogram   hexagon   segment   edge   Half-n-half Clue   4. pentágono   parallel lines   convex   hemisphere   pentagon   Half-n-half Clue   5. cuadrilátero   concave   ellipse   hemisphere   quadrangle   Half-n-half Clue   6. líneas perpendiculares   vertex   ray   perpendicular lines   hexagon   Half-n-half Clue   7. plano   plane   parallelogram   perpendicular lines   hexagon   Half-n-half Clue