如图,等腰△ABC的两边长分别为3cm,6cm,D,E分别是AB,AC上的点,将△ADE沿直线DE折叠,点A落在点A'处,且点A'在△ABC外部,则阴影部分图形的周长为 cm
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![如图,等腰△ABC的两边长分别为3cm,6cm,D,E分别是AB,AC上的点,将△ADE沿直线DE折叠,点A落在点A'处,且点A'在△ABC外部,则阴影部分图形的周长为 cm](/uploads/image/z/4097235-3-5.jpg?t=%E5%A6%82%E5%9B%BE%2C%E7%AD%89%E8%85%B0%E2%96%B3ABC%E7%9A%84%E4%B8%A4%E8%BE%B9%E9%95%BF%E5%88%86%E5%88%AB%E4%B8%BA3cm%2C6cm%2CD%2CE%E5%88%86%E5%88%AB%E6%98%AFAB%2CAC%E4%B8%8A%E7%9A%84%E7%82%B9%2C%E5%B0%86%E2%96%B3ADE%E6%B2%BF%E7%9B%B4%E7%BA%BFDE%E6%8A%98%E5%8F%A0%2C%E7%82%B9A%E8%90%BD%E5%9C%A8%E7%82%B9A%26%2339%3B%E5%A4%84%2C%E4%B8%94%E7%82%B9A%26%2339%3B%E5%9C%A8%E2%96%B3ABC%E5%A4%96%E9%83%A8%2C%E5%88%99%E9%98%B4%E5%BD%B1%E9%83%A8%E5%88%86%E5%9B%BE%E5%BD%A2%E7%9A%84%E5%91%A8%E9%95%BF%E4%B8%BA++++++cm)
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