在三棱锥P-ABC中,点P在平面ABC内的射影O是△ABC的垂心(三角形三条边上的高所在的直线交于一点,这点叫做这个三角形的垂心),求证:PA⊥BC.(能给我个图吗?真不好意思,没有图给你们看,还让
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/02 16:25:00
![在三棱锥P-ABC中,点P在平面ABC内的射影O是△ABC的垂心(三角形三条边上的高所在的直线交于一点,这点叫做这个三角形的垂心),求证:PA⊥BC.(能给我个图吗?真不好意思,没有图给你们看,还让](/uploads/image/z/6869061-45-1.jpg?t=%E5%9C%A8%E4%B8%89%E6%A3%B1%E9%94%A5P-ABC%E4%B8%AD%2C%E7%82%B9P%E5%9C%A8%E5%B9%B3%E9%9D%A2ABC%E5%86%85%E7%9A%84%E5%B0%84%E5%BD%B1O%E6%98%AF%E2%96%B3ABC%E7%9A%84%E5%9E%82%E5%BF%83%EF%BC%88%E4%B8%89%E8%A7%92%E5%BD%A2%E4%B8%89%E6%9D%A1%E8%BE%B9%E4%B8%8A%E7%9A%84%E9%AB%98%E6%89%80%E5%9C%A8%E7%9A%84%E7%9B%B4%E7%BA%BF%E4%BA%A4%E4%BA%8E%E4%B8%80%E7%82%B9%2C%E8%BF%99%E7%82%B9%E5%8F%AB%E5%81%9A%E8%BF%99%E4%B8%AA%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E5%9E%82%E5%BF%83%EF%BC%89%2C%E6%B1%82%E8%AF%81%EF%BC%9APA%E2%8A%A5BC.%EF%BC%88%E8%83%BD%E7%BB%99%E6%88%91%E4%B8%AA%E5%9B%BE%E5%90%97%3F%E7%9C%9F%E4%B8%8D%E5%A5%BD%E6%84%8F%E6%80%9D%2C%E6%B2%A1%E6%9C%89%E5%9B%BE%E7%BB%99%E4%BD%A0%E4%BB%AC%E7%9C%8B%2C%E8%BF%98%E8%AE%A9)
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