This solid is called a regular icosahedron, and it is made up of 20 equilateral triangles.

His actions destroyed his family's happiness.

He started a business without a plan, forgetting the lesson of 'peach and chestnut seeds take three years to bear fruit, persimmons eight years.'

The 24-cell is one of the geometric shapes in four dimensions.

The 120-cell is one of the regular polytopes in four dimensions.

The 正百二十胞體 is one of the regular polytopes in four dimensions.

The 正二十四胞體 is one of the regular polytopes in four dimensions.

Whenever he faced a difficult situation, he always said, 'The best of the Thirty-Six Stratagems is to run away.'