1. convexo   quadrilateral   concave   convex   straight line   Hint Half-n-half Clue   2. oval   hexagon   oval   convex   pentagon   Half-n-half Clue   3. quadrilátero   ellipse   polygon   quadrilateral   oval   Half-n-half Clue   4. côncavo   ray   concave   polygon   pentagon   Half-n-half Clue   5. borda   plane   prism   vertex   edge   Half-n-half Clue   6. quadrilátero   quadrilateral   quadrangle   edge   rhombus   Half-n-half Clue   7. plano   plane   pyramid   segment   ellipse   Half-n-half Clue