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High school mathematics has answers, analysis and concreteness.
In the triangular prism ABC-a1b1c1,the side length of the bottom surface is equal, and ∠ Baa 1 = ∠ CAA 1 = 60, a non-planar straight line AB/kloc is formed.

/math 2/ques/detail/bcdc 16 a6-f740-47ab-8938-c 29 b 0 BF 586 CB

Charting and analysis

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