如何证明任意四面体既有内切球又有外接球? 知乎 Template




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anonymous
anonymous
sketch #3260 sorry to over comment on your blog .haha. I 'm just flnpiipg through your posts after finding you through the KCWC. Recently I had this huge urge to learn to sketch with black ink pens. This cloud drawing is exactly the thing that I feel the need to put on paper. : )


anonymous
anonymous
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anonymous
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anonymous
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anonymous
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sketchmaster
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anonymous
anonymous
sketch #5131 Miley Cyrus by Vannak Von

tomski如何证明任意四面体既有内切球又有外接球? 知乎 coloring