已知△ABC中,∠BAC=90°,∠B=30°.用尺规画出射线AP(痕迹如图),则∠APB的度数为_____ .
![](https://img.xkw.com/dksih/QBM/2022/5/14/2979077187649536/2979484667527168/STEM/db88746d-0eef-436a-9fbb-2b4227436e9a.png?resizew=231)
2022·浙江杭州·一模 查看更多[4]
2022年浙江省杭州市萧山区中考一模数学试题(已下线)专题11.9 三角形的内角(巩固篇)(专项练习)-2022-2023学年八年级数学上册基础知识专项讲练(人教版)(已下线)专题1.9 认识三角形-三角形的内角(巩固篇)(专项练习)-2022-2023学年八年级数学上册基础知识专项讲练(浙教版)(已下线)2023湖南省岳阳市中考数学变式题9-12题
更新时间:2022-05-14 23:19:59
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【推荐1】如图,在
中,
,
分别是高和角平分线,点
在
的延长线上,
交
于点
,交
于点
.下列结论:①
;②
;③
;④
;其中正确的是______ (填序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40ed7b95cde653a700e75624ffd17408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e2c2253a4a537377f0d7b267357095.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c594077ff16b9974d156a3e3eb9e06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb3f1b6dd198777fe684c97329e2b71.png)
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【推荐2】如图,在
中,点
为
和
垂直平分线的交点,点
与点
关于
对称,连接
,
,
.若
中有一个角是50°,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afde09d82ae96f00c135732baee64776.png)
______ 度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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【推荐1】如图,在x、y轴上分别截取
、
,使
,再分别以点A、B为圆心,以大于
的长度为半径画弧,两弧交于点C.若C的坐标为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d49404351575703cfe8325d1352ec9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://img.xkw.com/dksih/QBM/2022/12/15/3131398942040064/3158950692724736/STEM/1dce3b6aecff40908f3ecc3c7bd14513.png?resizew=107)
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【推荐2】如图,在△ABC中,∠C=90°,∠B=30°,以A为圆心,任意长为半径画弧分别交AB、AC于点M和N,再分别以M、N为圆心,大于MN的长为半径画弧,两弧交于点P,连结AP并延长交BC于点D,则下列说法①AD是∠BAC的平分线;②∠ADC=60°③点D在AB的中垂线上;正确的个数是___ 个.
![](https://img.xkw.com/dksih/QBM/2015/8/13/1573896334794752/1573896341020672/STEM/97ddb2ac-e052-423b-8c24-6a4682013731.png?resizew=152)
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