Câu 1. Cho hình lập phương ABCD. A'B'C'D' có cạnh bằng 2. square Mệnh đề square square square square

The provided text is incomplete. It gives the context of a cube with side length 2, but doesn't state the question or provide any options (the squares represent missing parts). To answer, please provide the complete question and the available options (A, B, C, D etc.).