如图21,圆心O中AB是直径,C是圆心O上一点,∠ABC=45°,等腰直角△DCE中∠DCE是直角,点D在线段AC上.(1)若M是线段BE的中点,N是线段AD的中点,证明:MN=根号2OM(2)将△DCE绕点C逆时针a(0°<a<90°
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 11:17:30
![如图21,圆心O中AB是直径,C是圆心O上一点,∠ABC=45°,等腰直角△DCE中∠DCE是直角,点D在线段AC上.(1)若M是线段BE的中点,N是线段AD的中点,证明:MN=根号2OM(2)将△DCE绕点C逆时针a(0°<a<90°](/uploads/image/z/8702337-57-7.jpg?t=%E5%A6%82%E5%9B%BE21%2C%E5%9C%86%E5%BF%83O%E4%B8%ADAB%E6%98%AF%E7%9B%B4%E5%BE%84%2CC%E6%98%AF%E5%9C%86%E5%BF%83O%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E2%88%A0ABC%3D45%C2%B0%2C%E7%AD%89%E8%85%B0%E7%9B%B4%E8%A7%92%E2%96%B3DCE%E4%B8%AD%E2%88%A0DCE%E6%98%AF%E7%9B%B4%E8%A7%92%2C%E7%82%B9D%E5%9C%A8%E7%BA%BF%E6%AE%B5AC%E4%B8%8A.%EF%BC%881%EF%BC%89%E8%8B%A5M%E6%98%AF%E7%BA%BF%E6%AE%B5BE%E7%9A%84%E4%B8%AD%E7%82%B9%EF%BC%8CN%E6%98%AF%E7%BA%BF%E6%AE%B5AD%E7%9A%84%E4%B8%AD%E7%82%B9%EF%BC%8C%E8%AF%81%E6%98%8E%EF%BC%9AMN%3D%E6%A0%B9%E5%8F%B72OM%EF%BC%882%EF%BC%89%E5%B0%86%E2%96%B3DCE%E7%BB%95%E7%82%B9C%E9%80%86%E6%97%B6%E9%92%88a%EF%BC%880%C2%B0%EF%BC%9Ca%EF%BC%9C90%C2%B0)
xTnA;5ф%ٙݾ-Q?b@ZD#Ĵ
م'~3]$vw;g9sg8͉4AhT;^'{ca]:QW?0zfԸ` NHhUˉEm:?t(_NJU\բygVܓkQ$Lp n> ፏPټ{|Y;(xx]NZa|*eB?AVWGr:ftp[4MCV1GSתz?@E1u4taW{.nd