已知△ABC中,AB=15,BC=20,AC等于30,另一个与它相似的△A'B'C'的最长边为40,求△A'B'C'的其余两边长.2.已知△ABC三边的比为3:4:5,△A'B'C'相似于△ABC,且△A'B'C'的最大边长为15,求△A'B'C'的周长.3.如图
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![已知△ABC中,AB=15,BC=20,AC等于30,另一个与它相似的△A'B'C'的最长边为40,求△A'B'C'的其余两边长.2.已知△ABC三边的比为3:4:5,△A'B'C'相似于△ABC,且△A'B'C'的最大边长为15,求△A'B'C'的周长.3.如图](/uploads/image/z/5222683-19-3.jpg?t=%E5%B7%B2%E7%9F%A5%E2%96%B3ABC%E4%B8%AD%2CAB%EF%BC%9D15%2CBC%EF%BC%9D20%2CAC%E7%AD%89%E4%BA%8E30%2C%E5%8F%A6%E4%B8%80%E4%B8%AA%E4%B8%8E%E5%AE%83%E7%9B%B8%E4%BC%BC%E7%9A%84%E2%96%B3A%27B%27C%27%E7%9A%84%E6%9C%80%E9%95%BF%E8%BE%B9%E4%B8%BA40%2C%E6%B1%82%E2%96%B3A%27B%27C%27%E7%9A%84%E5%85%B6%E4%BD%99%E4%B8%A4%E8%BE%B9%E9%95%BF.2.%E5%B7%B2%E7%9F%A5%E2%96%B3ABC%E4%B8%89%E8%BE%B9%E7%9A%84%E6%AF%94%E4%B8%BA3%EF%BC%9A4%3A5%2C%E2%96%B3A%27B%27C%27%E7%9B%B8%E4%BC%BC%E4%BA%8E%E2%96%B3ABC%2C%E4%B8%94%E2%96%B3A%27B%27C%27%E7%9A%84%E6%9C%80%E5%A4%A7%E8%BE%B9%E9%95%BF%E4%B8%BA15%2C%E6%B1%82%E2%96%B3A%27B%27C%27%E7%9A%84%E5%91%A8%E9%95%BF.3.%E5%A6%82%E5%9B%BE)
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