四棱锥侧面积怎么求RT.四棱锥侧面积怎么求RT、两侧面三角形高为 √( 4²+(8/2)²)=4√2 每个三角形面积S2=1/2*6*4√2=12√2全部侧面积和为:2S1+2S2=2*20+2*12√2=40+24√2怎么回事?看不懂
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 11:45:15
![四棱锥侧面积怎么求RT.四棱锥侧面积怎么求RT、两侧面三角形高为 √( 4²+(8/2)²)=4√2 每个三角形面积S2=1/2*6*4√2=12√2全部侧面积和为:2S1+2S2=2*20+2*12√2=40+24√2怎么回事?看不懂](/uploads/image/z/8547424-16-4.jpg?t=%E5%9B%9B%E6%A3%B1%E9%94%A5%E4%BE%A7%E9%9D%A2%E7%A7%AF%E6%80%8E%E4%B9%88%E6%B1%82RT.%E5%9B%9B%E6%A3%B1%E9%94%A5%E4%BE%A7%E9%9D%A2%E7%A7%AF%E6%80%8E%E4%B9%88%E6%B1%82RT%E3%80%81%E4%B8%A4%E4%BE%A7%E9%9D%A2%E4%B8%89%E8%A7%92%E5%BD%A2%E9%AB%98%E4%B8%BA+%E2%88%9A%28+4%26sup2%3B%2B%288%2F2%29%26sup2%3B%29%3D4%E2%88%9A2+%E6%AF%8F%E4%B8%AA%E4%B8%89%E8%A7%92%E5%BD%A2%E9%9D%A2%E7%A7%AFS2%3D1%2F2%2A6%2A4%E2%88%9A2%3D12%E2%88%9A2%E5%85%A8%E9%83%A8%E4%BE%A7%E9%9D%A2%E7%A7%AF%E5%92%8C%E4%B8%BA%3A2S1%2B2S2%3D2%2A20%2B2%2A12%E2%88%9A2%3D40%2B24%E2%88%9A2%E6%80%8E%E4%B9%88%E5%9B%9E%E4%BA%8B%EF%BC%9F%E7%9C%8B%E4%B8%8D%E6%87%82)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 11:45:15