1. segmento   segment   hexagon   plane   hemisphere   Hint Half-n-half Clue   2. raio   convex   parallelogram   ray   vertex   Half-n-half Clue   3. prisma   concave   ellipse   prism   pentagon   Half-n-half Clue   4. pentágono   pentagon   quadrangle   vertex   hemisphere   Half-n-half Clue   5. pirâmide   polygon   parallel lines   concave   pyramid   Half-n-half Clue   6. retas perpendiculares   perpendicular lines   pentagon   plane   parallelogram   Half-n-half Clue   7. elipse   ellipse   perpendicular lines   straight line   rhombus   Half-n-half Clue