在等腰
中,
,过点C作直线l∥AB,F是l上的一点,且
,则
的度数为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
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20-21八年级上·浙江杭州·期中 查看更多[3]
浙江省杭州市建兰中学2020-2021学年八年级上学期期中数学试题(已下线)第19讲 等腰三角形(讲练)-备战2021年中考数学一轮复习讲练测(浙江)浙江省宁波市海曙区2022-2023学年八年级上学期期中数学试题
更新时间:2020-11-19 08:22:29
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【推荐1】如图,在△ABC中,∠ABC=45°,AB=
,AC=8,BC>6,点E,F分别在BC,AC边上,且AF=CE,则AE+BF的最小值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec978eb43bc4f9e7df83b0d0195dcda.png)
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【推荐2】如图,
中,
,
于点
,过点
作
且
,点
是
上一点且
,连接
、
,连接
交
于点
.下列结论中正确的有______ .
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dd7b335348f025008511a9e974339ed.png)
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ebe0690487ae9fc5d13eee94c44f7c3.png)
③
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④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/809bcd989a16f153492454224e684909.png)
⑤
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
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②
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③
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④
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【推荐1】如图,已知
中,
,
,
,点
、
分别在线段
、
上,将
沿直线
折叠,使点A的对应点
恰好落在线段
上,当
为直角三角形时,线段
的长为______ .
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【推荐2】如图,在
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【推荐1】如图,在菱形
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__________ 度.
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为腰的等腰三角形,则
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(2)若
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【推荐2】等腰三角形有一内角的度数为40°,一腰的垂直平分线与另一腰所在直线相交所成的锐角的度数为_________ .
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