1已知等腰三角形一腰上高与底边成45°腰长为2厘米求面积2勾股定律公式3在直角三角形中 一个如锐角30°斜边与较小直角边和为18cm求斜边长4如图 ----|----------|| |一人测河深竹竿插在离岸1.5m远
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![1已知等腰三角形一腰上高与底边成45°腰长为2厘米求面积2勾股定律公式3在直角三角形中 一个如锐角30°斜边与较小直角边和为18cm求斜边长4如图 ----|----------|| |一人测河深竹竿插在离岸1.5m远](/uploads/image/z/7020607-31-7.jpg?t=1%E5%B7%B2%E7%9F%A5%E7%AD%89%E8%85%B0%E4%B8%89%E8%A7%92%E5%BD%A2%E4%B8%80%E8%85%B0%E4%B8%8A%E9%AB%98%E4%B8%8E%E5%BA%95%E8%BE%B9%E6%88%9045%C2%B0%E8%85%B0%E9%95%BF%E4%B8%BA2%E5%8E%98%E7%B1%B3%E6%B1%82%E9%9D%A2%E7%A7%AF2%E5%8B%BE%E8%82%A1%E5%AE%9A%E5%BE%8B%E5%85%AC%E5%BC%8F3%E5%9C%A8%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%E4%B8%AD+%E4%B8%80%E4%B8%AA%E5%A6%82%E9%94%90%E8%A7%9230%C2%B0%E6%96%9C%E8%BE%B9%E4%B8%8E%E8%BE%83%E5%B0%8F%E7%9B%B4%E8%A7%92%E8%BE%B9%E5%92%8C%E4%B8%BA18cm%E6%B1%82%E6%96%9C%E8%BE%B9%E9%95%BF4%E5%A6%82%E5%9B%BE+----%7C----------%7C%7C+%7C%E4%B8%80%E4%BA%BA%E6%B5%8B%E6%B2%B3%E6%B7%B1%E7%AB%B9%E7%AB%BF%E6%8F%92%E5%9C%A8%E7%A6%BB%E5%B2%B81.5m%E8%BF%9C)
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