我在矩形ABCD的边AB上取一点M,在CD上取一点N,将纸片沿MN折叠,使MB与DN交于点K,得到△MNK.在矩形ABCD的边AB上取一点M,在CD上取一点N,将纸片沿MN折叠,使MB与DN交于点K,得到△MNK.(1)若∠1=70°,求
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![我在矩形ABCD的边AB上取一点M,在CD上取一点N,将纸片沿MN折叠,使MB与DN交于点K,得到△MNK.在矩形ABCD的边AB上取一点M,在CD上取一点N,将纸片沿MN折叠,使MB与DN交于点K,得到△MNK.(1)若∠1=70°,求](/uploads/image/z/7644297-57-7.jpg?t=%E6%88%91%E5%9C%A8%E7%9F%A9%E5%BD%A2ABCD%E7%9A%84%E8%BE%B9AB%E4%B8%8A%E5%8F%96%E4%B8%80%E7%82%B9M%2C%E5%9C%A8CD%E4%B8%8A%E5%8F%96%E4%B8%80%E7%82%B9N%2C%E5%B0%86%E7%BA%B8%E7%89%87%E6%B2%BFMN%E6%8A%98%E5%8F%A0%2C%E4%BD%BFMB%E4%B8%8EDN%E4%BA%A4%E4%BA%8E%E7%82%B9K%2C%E5%BE%97%E5%88%B0%E2%96%B3MNK%EF%BC%8E%E5%9C%A8%E7%9F%A9%E5%BD%A2ABCD%E7%9A%84%E8%BE%B9AB%E4%B8%8A%E5%8F%96%E4%B8%80%E7%82%B9M%2C%E5%9C%A8CD%E4%B8%8A%E5%8F%96%E4%B8%80%E7%82%B9N%2C%E5%B0%86%E7%BA%B8%E7%89%87%E6%B2%BFMN%E6%8A%98%E5%8F%A0%2C%E4%BD%BFMB%E4%B8%8EDN%E4%BA%A4%E4%BA%8E%E7%82%B9K%2C%E5%BE%97%E5%88%B0%E2%96%B3MNK%EF%BC%8E%EF%BC%881%EF%BC%89%E8%8B%A5%E2%88%A01%3D70%C2%B0%2C%E6%B1%82)
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