如图:在Rt△ACB中,∠ACB=90°,∠ABC=55°,将ABC顺时针旋转得Rt△A'CB',且使点B恰好在A'B'上,设A'C交AB于点D,求∠BDC的度数.
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![如图:在Rt△ACB中,∠ACB=90°,∠ABC=55°,将ABC顺时针旋转得Rt△A'CB',且使点B恰好在A'B'上,设A'C交AB于点D,求∠BDC的度数.](/uploads/image/z/5321390-14-0.jpg?t=%E5%A6%82%E5%9B%BE%EF%BC%9A%E5%9C%A8Rt%E2%96%B3ACB%E4%B8%AD%2C%E2%88%A0ACB%3D90%C2%B0%2C%E2%88%A0ABC%3D55%C2%B0%2C%E5%B0%86ABC%E9%A1%BA%E6%97%B6%E9%92%88%E6%97%8B%E8%BD%AC%E5%BE%97Rt%E2%96%B3A%26%2339%3BCB%26%2339%3B%2C%E4%B8%94%E4%BD%BF%E7%82%B9B%E6%81%B0%E5%A5%BD%E5%9C%A8A%26%2339%3BB%26%2339%3B%E4%B8%8A%2C%E8%AE%BEA%26%2339%3BC%E4%BA%A4AB%E4%BA%8E%E7%82%B9D%2C%E6%B1%82%E2%88%A0BDC%E7%9A%84%E5%BA%A6%E6%95%B0.)
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