Mảnh bìa nào dưới đây có thể gấp thành một hình lậ...
Câu hỏi: Mảnh bìa nào dưới đây có thể gấp thành một hình lập phương?![](data:image/png;base64,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)
A Hình 1 và hình 2
B Hình 2 và hình 3
C Hình 3 và hình 4
D Cả 4 hình trên
Câu hỏi trên thuộc đề trắc nghiệm
- Hình hộp chữ nhật. Hình lập phương (có lời giải chi tiết)