1. pirâmide   quadrangle   pyramid   parallel lines   concave   Hint Half-n-half Clue   2. quadrilátero   concave   quadrilateral   segment   edge   Half-n-half Clue   3. quadrilátero   polygon   quadrangle   segment   straight line   Half-n-half Clue   4. retas paralelas   perpendicular lines   rhombus   hexagon   parallel lines   Half-n-half Clue   5. segmento   vertex   quadrangle   parallelogram   segment   Half-n-half Clue   6. retas perpendiculares   rhombus   vertex   ray   perpendicular lines   Half-n-half Clue   7. borda   pentagon   edge   plane   ray   Half-n-half Clue