A,B,C,D是三棱锥的四个顶点,则到这四个顶点距离相等的平面共有几个
人气:159 ℃ 时间:2019-11-06 01:05:23
解答
由于三点决定一个平面,到这四个点距离相等的平面一定要平行于其中三个决定的平面.即此平面(所求平面)一定是第四点向前三点所做垂线段的垂直平分面.
由此知,这样的平面共有4个.
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