已知三角形的三边为a b c 设p=根号下1/2(a+b+c)求三角形的面积S=根号下跑p(p-a)(p-b)(p-c)求你们了
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![已知三角形的三边为a b c 设p=根号下1/2(a+b+c)求三角形的面积S=根号下跑p(p-a)(p-b)(p-c)求你们了](/uploads/image/z/3676914-18-4.jpg?t=%E5%B7%B2%E7%9F%A5%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E4%B8%89%E8%BE%B9%E4%B8%BAa+b+c+%E8%AE%BEp%3D%E6%A0%B9%E5%8F%B7%E4%B8%8B1%2F2%EF%BC%88a%2Bb%2Bc%29%E6%B1%82%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E9%9D%A2%E7%A7%AFS%3D%E6%A0%B9%E5%8F%B7%E4%B8%8B%E8%B7%91p%EF%BC%88p-a%29%28p-b%29%28p-c%29%E6%B1%82%E4%BD%A0%E4%BB%AC%E4%BA%86)
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