问题是这个正方形有12条棱,要求只过其中的两条棱作一个平面.只能过两条,不能有第三条经过这个面哦!
6个平面分别是面1584,面3762,面3456,面1278,面1368,面2457.
这么说你应该很清楚了吧,记得追加点分哟!
The figure above shows a cube .How many different planes can
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