初二几何题(较难)已知Rt三角形ABC中,BC=BA,连接EC,取EC的中点M,连接DM和BM,(1)若点D在AC上,点E在边AB上且与点B不重合,如图1,求证:BM=DM且BM垂直DM(2)将图1中的三角形ADE绕点A逆时针转小于45°
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![初二几何题(较难)已知Rt三角形ABC中,BC=BA,连接EC,取EC的中点M,连接DM和BM,(1)若点D在AC上,点E在边AB上且与点B不重合,如图1,求证:BM=DM且BM垂直DM(2)将图1中的三角形ADE绕点A逆时针转小于45°](/uploads/image/z/12058207-7-7.jpg?t=%E5%88%9D%E4%BA%8C%E5%87%A0%E4%BD%95%E9%A2%98%EF%BC%88%E8%BE%83%E9%9A%BE%EF%BC%89%E5%B7%B2%E7%9F%A5Rt%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2CBC%3DBA%2C%E8%BF%9E%E6%8E%A5EC%2C%E5%8F%96EC%E7%9A%84%E4%B8%AD%E7%82%B9M%2C%E8%BF%9E%E6%8E%A5DM%E5%92%8CBM%2C%EF%BC%881%EF%BC%89%E8%8B%A5%E7%82%B9D%E5%9C%A8AC%E4%B8%8A%2C%E7%82%B9E%E5%9C%A8%E8%BE%B9AB%E4%B8%8A%E4%B8%94%E4%B8%8E%E7%82%B9B%E4%B8%8D%E9%87%8D%E5%90%88%2C%E5%A6%82%E5%9B%BE1%2C%E6%B1%82%E8%AF%81%EF%BC%9ABM%3DDM%E4%B8%94BM%E5%9E%82%E7%9B%B4DM%EF%BC%882%EF%BC%89%E5%B0%86%E5%9B%BE1%E4%B8%AD%E7%9A%84%E4%B8%89%E8%A7%92%E5%BD%A2ADE%E7%BB%95%E7%82%B9A%E9%80%86%E6%97%B6%E9%92%88%E8%BD%AC%E5%B0%8F%E4%BA%8E45%C2%B0)
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