1. quadrilátero   quadrangle   straight line   oval   parallelogram   Hint Half-n-half Clue   2. borda   straight line   perpendicular lines   hexagon   edge   Half-n-half Clue   3. elipse   pentagon   ray   ellipse   concave   Half-n-half Clue   4. losango, rombo   hexagon   ellipse   straight line   rhombus   Half-n-half Clue   5. polígono   convex   polygon   hexagon   concave   Half-n-half Clue   6. reta, linha reta   parallelogram   hemisphere   parallel lines   straight line   Half-n-half Clue   7. retas perpendiculares   vertex   perpendicular lines   pentagon   hemisphere   Half-n-half Clue