Chrome，
QQ浏览器
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![[八上]含二倍内角三角形三边关系(二倍角用法之一|不用勾股与相似)](//imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F55e64c805a7c37348762066ba930de3be9f22b13.jpg%40672w_378h_1c_%21web-search-common-cover)
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播放：10 时间：2024-09-05简介： -
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![[八上]含二倍内角三角形三边关系(二倍角用法之一|不用勾股与相似)](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F55e64c805a7c37348762066ba930de3be9f22b13.jpg%40672w_378h_1c_%21web-search-common-cover)
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