四边形

例句：

1. 1. The square is a rectangular shape with four sides.
   正方形是一种有四条边的矩形形状。
2. 2. The architect designed the building with careful consideration of its geometry.
   建筑师仔细考虑了其几何结构来设计这座建筑。
3. 3. The pentagon is a special type of polygon with five sides.
   五边形是一种特殊类型的多边形，有五个边。