Дан куб ABCDA1B1C1D1 напишите попарно параллельные ребра куба с помощью знака параллельности
AA1//BB1, AB//A1B1, AB//DC, BC//AD, A1B1//D1C1, B1C1//A1D1, CD//C1D1, CC1//DD1, AA1//DD1, BB1//CC1
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AA1//BB1, AB//A1B1, AB//DC, BC//AD, A1B1//D1C1, B1C1//A1D1, CD//C1D1, CC1//DD1, AA1//DD1, BB1//CC1