1. heikousen   polygon   parallel lines   pyramid   perpendicular lines   Hint Half-n-half Clue   2. piramiddo   pyramid   hemisphere   quadrangle   oval   Half-n-half Clue   3. fuchi、hashi   pentagon   hemisphere   edge   plane   Half-n-half Clue   4. hankyuutai   hemisphere   ray   rhombus   convex   Half-n-half Clue   5. rankei   oval   quadrangle   pentagon   polygon   Half-n-half Clue   6. gokakkei   heptagon   parallelogram   plane   pentagon   Half-n-half Clue   7. purizumu   rhombus   convex   oval   prism   Half-n-half Clue