如图,在扇形
中,
,
是
上一点,连接
交
于点
,过点
作
交
于点
.若
,
,则
的长是( )
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19-20九年级下·湖北武汉·阶段练习 查看更多[4]
湖北省武汉市2019-2020学年九年级下学期五月调研数学试题2020年湖北省武汉市九年级质量检测(五调)数学试题2020年湖北省武汉市九年级五月调考数学试题(已下线)期末模拟检测(2)-2020-2021学年九年级数学上册十分钟同步课堂专练(沪科版)
更新时间:2020-06-14 22:40:36
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【推荐1】如图所示,在等边三角形
中,D,E分别在边
,
上,且
,
与
交于点F,
,垂足为点G.下列结论:①
;②
;③
是等边三角形;④
,其中正确结论的个数是( )
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a6574405000dab3fec93b438aa2de0.png)
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A.3 | B.2 | C.1 | D.0 |
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【推荐2】如图,
中,
,
,
,
是
的两条高,连接
,分别取
,
的中点
,则
的长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
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【推荐1】如图,
,
,
,
的平分线与AB的垂直平分线交于O,将∠C沿EF(E在BC上,F在AC上)折叠,点C与O点恰好重合,则∠OEC的度数为( )
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
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【推荐2】如图,△
是等边三角形,
是等腰直角三角形,
,
于点E,连接
,分别交
于点F、G,过点A作
交
于点H,
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;②
是等腰三角形;③
;④
;⑤
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【推荐1】已知点D、E分别在△ABC的边AB、AC上,下列给出的条件中,不能判定DE∥BC的是( )
A.BD:AB=CE:AC | B.DE:BC=AB:AD | C.AB:AC=AD:AE | D.AD:DB=AE:EC |
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【推荐2】如图,在平面直角坐标系中,
的顶点
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在
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,且
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作
轴的垂线交
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【推荐1】如图,等边
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