这道关于圆外切四边形等角线的题，是否有纯几何法证明？ 知乎 Sketch Coloring Page

这道关于圆外切四边形等角线的题，是否有纯几何法证明？ 知乎 Template

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sketch #4306 The burning watermelon!

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sketch #4306 The burning watermelon!

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sketch #4867 Johnny Depp Ronin Ronin

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anonymous

anonymous
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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
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. : )

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anonymous

anonymous
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sketch #1287 No smoke

anonymous

anonymous
sketch #1287 No smoke

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sketch #3285 Spongebob by Abbie Hayman

anonymous

anonymous
sketch #3285 Spongebob by Abbie Hayman

sketch #5063 Super Meat Boy by Alexander Volodimirovich Danilchenko

anonymous

anonymous
sketch #5063 Super Meat Boy by Alexander Volodimirovich Danilchenko

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sketch #1232 Dylan Thomas

anonymous

anonymous
sketch #1232 Dylan Thomas

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anonymous

anonymous
sketch #2877 Elvis by Karoline Castillo

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anonymous

anonymous
sketch #4857 Eye by Thu Seba Piñeraa

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sketch #4511 Yao Ming by Betty Marie Melzer

anonymous

anonymous
sketch #4511 Yao Ming by Betty Marie Melzer

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Emin AltınKöprü
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sketch #5190 That Night by Nînâ Yämâhä

anonymous

anonymous
sketch #5190 That Night by Nînâ Yämâhä

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