将两块全等的含30°角的三角尺如图(1)摆放在一起,它们的较短直角边长为3.(1)将△ECD沿直线l向左平移到图(2)的位置,使E点落在AB上,则CC′= ( );(2)将△ECD绕点C逆时针旋转到图
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![将两块全等的含30°角的三角尺如图(1)摆放在一起,它们的较短直角边长为3.(1)将△ECD沿直线l向左平移到图(2)的位置,使E点落在AB上,则CC′= ( );(2)将△ECD绕点C逆时针旋转到图](/uploads/image/z/7057486-46-6.jpg?t=%E5%B0%86%E4%B8%A4%E5%9D%97%E5%85%A8%E7%AD%89%E7%9A%84%E5%90%AB30%C2%B0%E8%A7%92%E7%9A%84%E4%B8%89%E8%A7%92%E5%B0%BA%E5%A6%82%E5%9B%BE%EF%BC%881%EF%BC%89%E6%91%86%E6%94%BE%E5%9C%A8%E4%B8%80%E8%B5%B7%2C%E5%AE%83%E4%BB%AC%E7%9A%84%E8%BE%83%E7%9F%AD%E7%9B%B4%E8%A7%92%E8%BE%B9%E9%95%BF%E4%B8%BA3%EF%BC%8E%EF%BC%881%EF%BC%89%E5%B0%86%E2%96%B3ECD%E6%B2%BF%E7%9B%B4%E7%BA%BFl%E5%90%91%E5%B7%A6%E5%B9%B3%E7%A7%BB%E5%88%B0%E5%9B%BE%EF%BC%882%EF%BC%89%E7%9A%84%E4%BD%8D%E7%BD%AE%2C%E4%BD%BFE%E7%82%B9%E8%90%BD%E5%9C%A8AB%E4%B8%8A%2C%E5%88%99CC%E2%80%B2%3D+%28+++++++%29%EF%BC%9B%EF%BC%882%EF%BC%89%E5%B0%86%E2%96%B3ECD%E7%BB%95%E7%82%B9C%E9%80%86%E6%97%B6%E9%92%88%E6%97%8B%E8%BD%AC%E5%88%B0%E5%9B%BE)
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