1. cuadrilátero   hemisphere   quadrilateral   ray   vertex   Hint Half-n-half Clue   2. polígono   polygon   pyramid   ray   quadrilateral   Half-n-half Clue   3. hemisferio   convex   hemisphere   polygon   plane   Half-n-half Clue   4. líneas perpendiculares   vertex   perpendicular lines   parallel lines   prism   Half-n-half Clue   5. convexo   hemisphere   convex   ellipse   quadrilateral   Half-n-half Clue   6. heptágono   heptagon   straight line   convex   plane   Half-n-half Clue   7. rayo   pyramid   hemisphere   ray   heptagon   Half-n-half Clue