Summable Areas

[shenghuiy (Shenghui Yang)]

This is an interesting geometry problem posted by Dr. Shan Zun, ex-IMO head coach, PRC

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Open in Wolfram Cloud ↗

[wufei1978 (Frederick Wu)]

Interesting problem, I approach the proof from anther prospective from vectors.

Open in Wolfram Cloud ↗

[shenghuiy (Shenghui Yang)]

Frederick, nice solution! It reminds of ??? formula.

[wolframcommunity (EDITORIAL BOARD)]

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