如图所求三棱锥的体积为：正方体的体积减去4个正三棱锥的体积即1-4×
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故答案为：
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在棱长为1的正方体ABCD-A1B1C1D1中，四面体ACB1D1的体积为_．
在棱长为1的正方体ABCD-A1B1C1D1中，四面体ACB1D1的体积为______．
数学人气：186 ℃时间：2020-02-24 21:33:45
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如图所求三棱锥的体积为：正方体的体积减去4个正三棱锥的体积即1-4×
故答案为：
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