1 . 如图,在
中,
为线段
上一点,线段
绕点
逆时针旋转
能与线段
重合,点
为
与
的交点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/014b0a2a-0f7e-4e18-9d28-fef261cc2ad6.png?resizew=176)
(1)若
,求线段
的长
(2)若
为
的中点,猜想
与
的数量关系,并证明你猜想的结论.
(3)设
,点
在线段
上运动,点
在线段
上运动,运动过程中,当
的值最小时,请直接写出
的面积;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50732283d4809c56c6f876f1482d58a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/014b0a2a-0f7e-4e18-9d28-fef261cc2ad6.png?resizew=176)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22a48143f17f2f88c764b3e8f1f78585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9652d6ef2437683344af33f47584ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6702d692c1e5a3ddb2f77247bf008779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999c42a021bdc576f097246b9e64d986.png)
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2 . 如图,抛物线
与x轴交于点A,点
,与y轴交于点C,直线
过点A和点C.
(2)点P是位于直线
上方抛物线上的动点,过点P作x轴的垂线,分别与x轴、
交于点D、E,过点D作
交
于点F,求
的最小值及此时点P的坐标;
(3)在(2)问取得最小值的情况下,将点P向下平移
个单位长度得到点
,将原抛物线y向左平移1个单位长度得到抛物线y,将直线
向右平移9个单位长度得到直线
.设抛物线y与直线
的交点为点M、N(点M在点N的左边),在y轴上是否存在点Q,使得
是以
为腰的等腰三角形?若存在,请直接写出符合条件的点Q的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd275cf054b06be3a3682a6a41af06a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c608def11fa0e2b34f05592ef1d11fd8.png)
(2)点P是位于直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fda6d76fb350332472e76fefcca6a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace2c179130f74e0a01a9c04c27cf7e4.png)
(3)在(2)问取得最小值的情况下,将点P向下平移
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1cf820d780b90c8f2425aab6b075ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c608def11fa0e2b34f05592ef1d11fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba5a9d54648e191dfc26b16c36b4d0cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf90e677da86080c7278a34d34ca8e78.png)
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3 . 小明最近学习了三角形的角平分线相关知识,进一步进行探究之后发现,三角形的一条角平分线分三角形一边的两线段之比值恰好等于三角形的另外两边之比值.
请根据以下思路完成作图和填空:
在
中,
平分
,在
的右侧作
(保留作图痕迹,不写过程);
延长
交
与点E,求证:
.
证明:∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107e5af7174a2f805f87bbfe01b14033.png)
①
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38620ba27282dd12c91dc5969a6d0df.png)
又∵
平分![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
②
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac45f13ca13249e6c6175d19d08bb4a6.png)
③
又∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11070518a54a132e159d3b18628c2c7.png)
④
∴
.
请根据以下思路完成作图和填空:
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107e5af7174a2f805f87bbfe01b14033.png)
延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02bad7fac070822f4c8b4f8b64bda72.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/9/888e9f2b-f571-493a-afc1-bb91eeb6adef.png?resizew=161)
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107e5af7174a2f805f87bbfe01b14033.png)
①
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38620ba27282dd12c91dc5969a6d0df.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
②
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac45f13ca13249e6c6175d19d08bb4a6.png)
③
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11070518a54a132e159d3b18628c2c7.png)
④
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02bad7fac070822f4c8b4f8b64bda72.png)
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4 . 如图,点E在矩形
边
上,将
沿
翻折,点D恰好落在
上的点F处,若
,
,连接
,与
交于H点,连接
,则点F到
的距离为 __________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d59461614e585c966d847c512e5b92d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0268d04b9dea7629af27af9a0285a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/13/e13a8f90-4345-4966-aac6-9c07232d04ed.jpg?resizew=124)
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2023-09-22更新
|
619次组卷
|
3卷引用:重庆市九龙坡区重庆实验外国语学校2022-2023学年八年级下学期6月月考数学试题
名校
5 . 如图,已知线段
与直线
平行,
是
的平分线,
交直线
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/a3e81eee-f41a-4f7a-ba74-7911499e5c46.png?resizew=142)
(1)尺规完成以下基本作图:作
的垂直平分线,交
于点F,连接
并延长交直线
于点G,(保留作图痕迹,不写作法);
(2)在(1)的条件下,某学习小组讨论发现线段
之间存在一定的数量关系,请你根据该兴趣小组的思路完成下面的填空:
解:
,理由如下,如图所示,
,
,
为
的垂直平分线,
,
在
和
中,
,
,
,
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/a3e81eee-f41a-4f7a-ba74-7911499e5c46.png?resizew=142)
(1)尺规完成以下基本作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)在(1)的条件下,某学习小组讨论发现线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/199d9b1b8e0fca812e7b9999151c07c4.png)
解:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdefab9414a3b509f82e194d71cce4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60cc741b6fba7ce725bf7bb6270c8ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b59803eeafe00a6247dbe431ab6c1c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b103d3b19a5104e69ab3f6ab4e8d53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a67f932fc08cc2d3e4ed1545f77975a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/887dc647b598f0404e8f11dd3b01e5ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96aa8e7674ee7205fee0dc78949cede6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c6db62171bc906a0182bb601a35a816.png)
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6 . 已知,在平行四边形
中,
,
,E为
上一点,连接
交
于F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/128fe24c-0177-4b42-ab24-23590bf1c626.png?resizew=550)
(1)如图1,若点E与点C重合,且
,求
的长;
(2)如图2,当点E在
边上时,过点D作
于G,延长
交
于H,连接
.求证:
;
(3)如图3,在(2)的条件下,连接
交
于M,当M为
的中点时,请直接写出
与
的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ce06dbe9e1177468781ba4aff85ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5fc4ad65b723b6a8da4c8dac154e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/128fe24c-0177-4b42-ab24-23590bf1c626.png?resizew=550)
(1)如图1,若点E与点C重合,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)如图2,当点E在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c132b1634ce91b5879940593c4c65716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034e5ca4a83030c1f9d37cf47ca7e358.png)
(3)如图3,在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
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7 . 如图,已知正方形
,点E为
边上一点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/57dc07ca-7fe2-4118-8ca1-7db9dd546b2a.png?resizew=160)
(1)用尺规完成以下基本作图:(要求:不写作法,保留作图痕迹)
①在
边上截取线段
,使
,连接
,与
交于点G;
②过点A作
的垂线,垂足为H;
(2)在(1)所作图形中,求证:
,请补全下面的证明过程.
证明:
∵ ,
,
.
由(1)知
,
与
中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b28e6a1105ba155d99f3cc574012a5.png)
.
∴ .
∵
,
.
是
的一个外角,
∴ .
由(1)知
,
.
∴ .
∴
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/57dc07ca-7fe2-4118-8ca1-7db9dd546b2a.png?resizew=160)
(1)用尺规完成以下基本作图:(要求:不写作法,保留作图痕迹)
①在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a2e63e2e76266d606946a11c1d75de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
②过点A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)在(1)所作图形中,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/215a6ad84ef3719a998040b31acdf2a6.png)
证明:
∵ ,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da7c33018a5ad5b413375c62c06ef27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8476e0b1b5e20160da8e22b8a06684bd.png)
由(1)知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a2e63e2e76266d606946a11c1d75de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b28e6a1105ba155d99f3cc574012a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c958a5c55365c52e16235d2a64743b50.png)
∴ .
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/169d572bf2673d2e280023922e005f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e48de6a80dc73f8723f6a1e13fe8f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374cb591c64876344b5d2557598eca30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdbbc61985b4b1063e0e966de68fbdc.png)
∴ .
由(1)知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e45b9efd79e3e9e9101cf0eb98c824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04aee558e52d433fc923d949a19d67ff.png)
∴ .
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/215a6ad84ef3719a998040b31acdf2a6.png)
您最近一年使用:0次
2022-11-17更新
|
98次组卷
|
2卷引用:重庆市重庆文德中学校2022-2023学年九年级上学期10月月考数学试题
解题方法
8 . 在
中,
,
为
外一点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/25f318a0-3649-4b5d-a69f-c29989a97012.png?resizew=485)
(1)如图
,若
,
,连接
交
于点
,且
,求
.
(2)如图
,
,
,
交
于点
,
垂直平分
,且
,
,
分别为
,
中点,连接
,求证:
.
(3)如图
,若
,
,将
绕着
点顺时针旋转
得到
,连接
,
,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/25f318a0-3649-4b5d-a69f-c29989a97012.png?resizew=485)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151adae7bf60f109d3f275fd9fd4e5b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17bc77b37986d658edad69992c5ea0c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f291575950d5a6b73815a528246054f8.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1d267eeb09c171c3e847f0597be31c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d85cff8ff06a758af3cc8ed16f99cc0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40087b4ba833920d67bd1e71634d984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e1e71242979cd2a303aa1f437a7248.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151adae7bf60f109d3f275fd9fd4e5b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b123ae31090740589ba27a846620b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b25f3ea33cc08b1e2a0d9c3a9dccaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c013bbe1fb6e9acf461548b5cf6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
您最近一年使用:0次
9 . 如图,△ABC中,点D为边BC的中点,连接AD,将△ADC沿直线AD翻折至△ABC所在平面内,得△ADC′,连接CC′,分别与边AB交于点E,与AD交于点O.若AE=BE,AD=6,则BC′的长为________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/a4f338c7-2e9b-4b18-a771-9ba92907a31a.png?resizew=249)
您最近一年使用:0次
2022-06-04更新
|
232次组卷
|
2卷引用:重庆市巴渝学校2023-2024学年九年级下学期第一次月考数学试题
名校
10 . 如图,点D是△ABC中AB边上靠近A点的四等分点,即4AD=AB,连接CD,F是AC上一点,连接BF与CD交于点E,点E恰好是CD的中点,若S△ABC=8,则四边形ADEF的面积是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/41f07470-55a4-4142-9806-726665125cea.png?resizew=169)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/41f07470-55a4-4142-9806-726665125cea.png?resizew=169)
A.4 | B.![]() | C.2 | D.![]() |
您最近一年使用:0次
2022-03-07更新
|
1074次组卷
|
4卷引用:重庆市第一中学2020-2021学年七年级下学期第一次月考数学试题
重庆市第一中学2020-2021学年七年级下学期第一次月考数学试题重庆市沙坪坝区第一中学校2022-2023学年七年级下学期3月月考数学试题重庆市沙坪坝区南渝中学校2022-2023学年七年级下学期期中数学试题(已下线)第4章 图形的相似(单元测试·拔尖卷)-2023-2024学年九年级数学上册基础知识专项突破讲与练(北师大版)