如图,
,
平分
,
,下列结论:①
;②
;③
;④
;其中正确结论是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa70e7c9ef8b856b494d370b7d76482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99839f256f2fb45907f4966d06a70650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8472ea8bb5a2ce80318908c1786c851.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31360b92e234dfacc88fd49f57d5acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63980aba6b0acabca8d0f811c822f9f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f9b2dd2b9fd3ae5c3ac42aeefa0e3e7.png)
23-24七年级上·福建福州·期末 查看更多[4]
福建省福州格致中学2023-2024学年七年级上学期期末考数学试题(已下线)第一单元 平行线能力提升测试卷-2023-2024学年七年级数学下册《知识解读·题型专练》(浙教版)(已下线)第七单元 平面图形的认识(二)能力提升测试卷-2023-2024学年七年级数学下册《知识解读·题型专练》(苏科版)广东省广州市荔湾区2023-2024学年七年级下学期期中数学试题
更新时间:2024-02-01 08:13:35
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【推荐1】如图,在四边形ABCD中,
的角平分线与
的外角平分线相交于点P,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b6fede7d2da3ccecf3f9d32a10346c3.png)
______ .
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【推荐2】已知射线
在
内部,其中
为
的三等分线,
分别平分
和
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/021bc0ff7e36c9d6d70ddd2e51e8c04c.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/067b28e7f14e5dcfb981d2f7a75cfe6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
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【推荐1】如图1,在反射现象中,反射光线,入射光线和法线都在同一个平面内;反射光线和入射光线分别位于法线两侧;反射角r等于入射角i.这就是光的反射定律.
上,镜面
的调节角
,激光笔发出的光束
射到平面镜上,若激光笔与水平天花板(直线
的夹角
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(2)若(1)中镜面
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,则下列度数中,反射光束
与天花板所形成的角
可能取到的度数为______ (填序号).
①
;②
;③
;④
.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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(2)若(1)中镜面
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①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1de27e79e9a276238d608f828e31709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c706cb016de44886922ee89634d30c0.png)
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【推荐2】如图,在△ABC中,AB=4,AC=6,AD是∠BAC的平分线,M是BC的中点,ME∥AD交AC于F,交BA的延长线于E.则BE=___ .
![](https://img.xkw.com/dksih/QBM/2021/12/18/2874973171990528/2880404674961408/STEM/e1a7d200-b9d5-47c2-877b-c1c6ec08e31f.png?resizew=217)
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【推荐1】如图,
,点F在线段
上,点E在线段
上,
,
,
交线段
于点P,过点D作
于点H.有下列结论:①
;②
;③若
,则
;④若
,则
.其中结论正确的有________ (填写所有正确结论的序号)
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【推荐2】如图,已知直线AB,CD被直线AC所截,E是平面内任意一点(点E不在直线AB,CD,AC上),设∠BAE=α,∠DCE=β.下列各式:①α+β;②α﹣β;③β−α;④180°﹣α﹣β;⑤360°﹣α﹣β.以上结果可以作为∠AEC的度数的是___ .(填序号)
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