五点形

例句：

1. 1. The pentagon is a geometric figure with five sides.
   五边形是一个有五个边的几何图形。
2. 2. The pentagon is often used in architectural designs to create a sense of balance.
   五边形常被用于建筑设计中，以创造平衡感。
3. 3. In the game of chess, the pentagon is a key element in strategic planning.
   在国际象棋游戏中，五边形是战略规划的关键元素。