如图,△ABC为直角三角形,∠C=90°,∠A=30°BC=10cm,四边形DEFG为矩形,DE=10√3cm,EF=20cm且点C`B`E`F.在同一条直线上点B与E重合.(1)求AC长(2)将Rt△ABC以每秒2cm的速度沿矩形DEFG的边EF向右平移,当
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![如图,△ABC为直角三角形,∠C=90°,∠A=30°BC=10cm,四边形DEFG为矩形,DE=10√3cm,EF=20cm且点C`B`E`F.在同一条直线上点B与E重合.(1)求AC长(2)将Rt△ABC以每秒2cm的速度沿矩形DEFG的边EF向右平移,当](/uploads/image/z/2090259-27-9.jpg?t=%E5%A6%82%E5%9B%BE%2C%E2%96%B3ABC%E4%B8%BA%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%2C%E2%88%A0C%EF%BC%9D90%C2%B0%2C%E2%88%A0A%EF%BC%9D30%C2%B0BC%EF%BC%9D10cm%2C%E5%9B%9B%E8%BE%B9%E5%BD%A2DEFG%E4%B8%BA%E7%9F%A9%E5%BD%A2%2CDE%EF%BC%9D10%E2%88%9A3cm%2CEF%EF%BC%9D20cm%E4%B8%94%E7%82%B9C%60B%60E%60F.%E5%9C%A8%E5%90%8C%E4%B8%80%E6%9D%A1%E7%9B%B4%E7%BA%BF%E4%B8%8A%E7%82%B9B%E4%B8%8EE%E9%87%8D%E5%90%88.%281%29%E6%B1%82AC%E9%95%BF%EF%BC%882%EF%BC%89%E5%B0%86Rt%E2%96%B3ABC%E4%BB%A5%E6%AF%8F%E7%A7%922cm%E7%9A%84%E9%80%9F%E5%BA%A6%E6%B2%BF%E7%9F%A9%E5%BD%A2DEFG%E7%9A%84%E8%BE%B9EF%E5%90%91%E5%8F%B3%E5%B9%B3%E7%A7%BB%2C%E5%BD%93)
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