Chrome，
QQ浏览器
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播放：21 时间：2024-06-19简介： -
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![[高中数学]直线倾斜角、斜率，为什么直线垂直k1·k2=-1？](//imgshow.1ydt.com/img?url=%2F%2Fi1.hdslb.com%2Fbfs%2Farchive%2F09e032e76b500e86563494cbf6603e424a9c11e2.jpg%40672w_378h_1c_%21web-search-common-cover)
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![[高中数学]直线倾斜角、斜率，为什么直线垂直k1·k2=-1？](http://imgshow.1ydt.com/img?url=%2F%2Fi1.hdslb.com%2Fbfs%2Farchive%2F09e032e76b500e86563494cbf6603e424a9c11e2.jpg%40672w_378h_1c_%21web-search-common-cover)
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