1. 縁、端　   parallel lines   pentagon   edge   hexagon   Hint Half-n-half Clue   2. 菱形, 斜方形　   ellipse   segment   rhombus   quadrangle   Half-n-half Clue   3. 直線   perpendicular lines   pentagon   straight line   hemisphere   Half-n-half Clue   4. 四角形   perpendicular lines   polygon   quadrangle   straight line   Half-n-half Clue   5. 七角形   oval   plane   straight line   heptagon   Half-n-half Clue   6. 五角形   hexagon   straight line   plane   pentagon   Half-n-half Clue   7. 頭頂　   oval   polygon   rhombus   vertex   Half-n-half Clue