quinquecuspid

例句：

1. 1. The pentagon is a shape with five sides.
   五边形是一种有五个边的图形。
2. 2.The pentagon was featured in the logo of the company.
   五边形被用作公司标志的一部分。
3. 3. The pentagon is often used to represent perfection and balance.
   五边形常被用来象征完美和平衡。