trinalgon

例句：

1. 1. The triangular prism is a common shape used in architectural design.
   三棱柱是一种常见的建筑设计形状。
2. 2.The triangular pyramid has a unique shape that makes it stand out from other pyramids.
   三棱锥有一个独特的形状，使它与其他金字塔不同。
3. 3.In geometry, a triangular prism is a three-dimensional figure with six sides and three angles.
   在几何学中，一个三棱柱是一个有六个面和三个角的三维图形。