正三棱柱ABC-A1B1C1中,若∠BAC=90°,AB=AC=AA1,则异面直线BA1与AC1所成角等于?
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正三棱柱ABC-A1B1C1中,若∠BAC=90°,AB=AC=AA1,则异面直线BA1与AC1所成角等于?
正三棱柱ABC-A1B1C1中,若∠BAC=90°,AB=AC=AA1,则异面直线BA1与AC1所成角等于?
正三棱柱ABC-A1B1C1中,若∠BAC=90°,AB=AC=AA1,则异面直线BA1与AC1所成角等于?
60°
∠BAC=90°,AB=AC=AA1,则两个这样的正三棱柱,将BCC1B1这一斜边面重叠放置,则可形成一个立方体.
AC1‖BD1,BA1、BD1、A1D1三天线都是立方体三个面的对角线,所以三遍相等,即这三条线所形成的三角形是等边三角形.
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