如图是以点为圆心,
为直径的圆形纸片,点
在
上,将该圆形纸片沿直线
对折,点
落在
上的点
处(不与点
重合),连接
,
,
.设
与直径
交于点
.若
,则
的值等于
更新时间:2024-03-31 15:18:34
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【推荐1】如图所示,已知⊙O是△ABD的外接圆,AB是⊙O的直径,CD是⊙O的弦,∠ABD=54°,则∠BCD=_____ .
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【推荐2】如图,
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【推荐1】如图5, 在△ABC中,AB=8,AC=5,M是AC边上的一点,AM=2, 在AB边上取一点N,使以A、M、N为顶点的三角形与△ABC相似,则AN的长为__________ .
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【推荐2】如图,正方形
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