icosahedron

例句：

1. 1.The octahedron is a shape with eight equal sides.
   八面体是一种有八个相等边的几何形状。
2. 2.The dodecahedron is a shape with twelve equal faces.
   十二面体是一种有十二个相等面的几何形状。
3. 3.The icosahedron is a shape with twenty-four equal faces.
   二十面体是一种有二十四个相等面的几何形状。