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奥贝尔定理：证明正方形中心连线EG⊥FH且EG=FH[数学竞赛]
数学竞赛＆强基计划＆自主招生32/46
App14:12![奥贝尔定理：证明正方形中心连线EG⊥FH且EG=FH[数学竞赛]](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/b216f2e02f7f49cab00148c348e38cbd~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20250222230934E88827FD870F9BD0B0C2&requestFrom=704&version_code=80402&x-expires=1771772975&x-signature=YwU%2F23yDoA2p0OsiW2w2vLfme%2FA%3D)
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