已知:如图所示,要在高AD=80mm,底边BC=120mm的三角形余料中截出一个正方形板材PQMN.求它的边长.它的解答是设边长为x,(80-x)/x=80/120,请问这个比是怎么算出来的?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/14 18:13:19
![已知:如图所示,要在高AD=80mm,底边BC=120mm的三角形余料中截出一个正方形板材PQMN.求它的边长.它的解答是设边长为x,(80-x)/x=80/120,请问这个比是怎么算出来的?](/uploads/image/z/5263634-2-4.jpg?t=%E5%B7%B2%E7%9F%A5%EF%BC%9A%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E8%A6%81%E5%9C%A8%E9%AB%98AD%EF%BC%9D80mm%2C%E5%BA%95%E8%BE%B9BC%EF%BC%9D120mm%E7%9A%84%E4%B8%89%E8%A7%92%E5%BD%A2%E4%BD%99%E6%96%99%E4%B8%AD%E6%88%AA%E5%87%BA%E4%B8%80%E4%B8%AA%E6%AD%A3%E6%96%B9%E5%BD%A2%E6%9D%BF%E6%9D%90PQMN%EF%BC%8E%E6%B1%82%E5%AE%83%E7%9A%84%E8%BE%B9%E9%95%BF%EF%BC%8E%E5%AE%83%E7%9A%84%E8%A7%A3%E7%AD%94%E6%98%AF%E8%AE%BE%E8%BE%B9%E9%95%BF%E4%B8%BAx%2C%2880-x%29%2Fx%3D80%2F120%2C%E8%AF%B7%E9%97%AE%E8%BF%99%E4%B8%AA%E6%AF%94%E6%98%AF%E6%80%8E%E4%B9%88%E7%AE%97%E5%87%BA%E6%9D%A5%E7%9A%84%3F)
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