如图所示的长方体ABCD-A1B1C1D1中,底面ABCD是边长2的正方形,0为AC与BD的交点,B1B=根号2,M是线段B1D1的中点求:二面角B-AB1-C 的大小
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![如图所示的长方体ABCD-A1B1C1D1中,底面ABCD是边长2的正方形,0为AC与BD的交点,B1B=根号2,M是线段B1D1的中点求:二面角B-AB1-C 的大小](/uploads/image/z/11126728-64-8.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%E7%9A%84%E9%95%BF%E6%96%B9%E4%BD%93ABCD-A1B1C1D1%E4%B8%AD%2C%E5%BA%95%E9%9D%A2ABCD%E6%98%AF%E8%BE%B9%E9%95%BF2%E7%9A%84%E6%AD%A3%E6%96%B9%E5%BD%A2%2C0%E4%B8%BAAC%E4%B8%8EBD%E7%9A%84%E4%BA%A4%E7%82%B9%2CB1B%3D%E6%A0%B9%E5%8F%B72%2CM%E6%98%AF%E7%BA%BF%E6%AE%B5B1D1%E7%9A%84%E4%B8%AD%E7%82%B9%E6%B1%82%EF%BC%9A%E4%BA%8C%E9%9D%A2%E8%A7%92B-AB1-C+%E7%9A%84%E5%A4%A7%E5%B0%8F)
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