1. pirâmide   pyramid   pentagon   ray   rhombus   Hint Half-n-half Clue   2. borda   quadrangle   edge   concave   convex   Half-n-half Clue   3. quadrilátero   ray   vertex   concave   quadrangle   Half-n-half Clue   4. losango, rombo   rhombus   plane   quadrangle   parallelogram   Half-n-half Clue   5. retas perpendiculares   concave   oval   perpendicular lines   vertex   Half-n-half Clue   6. quadrilátero   straight line   quadrangle   segment   quadrilateral   Half-n-half Clue   7. raio   quadrilateral   ray   pentagon   convex   Half-n-half Clue