名校
1 . 如图,
,下列条件①
;②
;③
;④
中,若只添加一个条件就可以证明
,则所有正确条件的序号是________ .
A.①② B.①③ C.①②③ D.②③④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/591cb1d6d2fa2f4d438364a5fc52bbd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024dc2ccbbe321774df5d44e8785b203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/960d61e0d9a749cba705359a15e683d2.png)
A.①② B.①③ C.①②③ D.②③④
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/18/74fad70b-5352-460c-b57d-b3b19c67584c.png?resizew=115)
您最近一年使用:0次
2 . 如图,在
中,已知
,
平分
,要说明
,请把下面的证明过程补充完整.
证明:∵
平分
,
∴
___________(1)___________.
在
和
中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5a81e2a88f61f2cea5ea6715a36bbd.png)
∴
(___________(4)___________).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/901d94b32038d99ef9e748f1fe2b8c55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/1/c53540f7-7c52-4be8-a2a1-4eff76f4ff8b.jpg?resizew=149)
证明:∵
![](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/64a2b104be37d7663966afb47fab83c7.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5a81e2a88f61f2cea5ea6715a36bbd.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/901d94b32038d99ef9e748f1fe2b8c55.png)
您最近一年使用:0次
名校
3 . 如图,
是等边三角形
内一点,将线段
绕点
顺时针旋转
得到线段
,连接
.若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e9ad6d50f5a45dbd9f70b2a0fbdeef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/791f4df9-1b41-490a-a31d-67de8ba7c853.png?resizew=161)
(1)证明![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f17062bfdc915eeceba02675ad0a6207.png)
(2)求三角形
的面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.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/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e9ad6d50f5a45dbd9f70b2a0fbdeef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/791f4df9-1b41-490a-a31d-67de8ba7c853.png?resizew=161)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f17062bfdc915eeceba02675ad0a6207.png)
(2)求三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1956db288a5a3b8c97d2539e9e5e4f85.png)
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4 . 如图,点
,
,
,
在一条直线上,
,
,只需添加一个条件______ ,即可证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958b45552f9fa1a60016483bd8246be9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac61f3477e623aa4f924a82bd7a06ce4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/9aebb8e6-c6b3-4b24-b621-8ec9530b9795.png?resizew=230)
您最近一年使用:0次
5 . 在研究三角形中点或中线问题时,常采用延长中线一倍的办法,此法称为:倍长中线.
(1)【原题呈现】八年级上册课本P27:如图①,在
中,
是
边上的中线,点E在
的延长线上,且
.请证明:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/f9ceac8d-5418-4679-8e39-c67f4028e6fe.png?resizew=245)
(2)【思路探究】如图②,已知线段b,c,m.求作:
,使
,
,
边上的中线
.请完善以下作图思路,并填写相应的作图依据.
①已知共顶点两边
,要想作出
,还需要知道
或
.若知道
,则可以根据______作出符合条件的
;若知道
,则可以根据______作出符合条件的
;但目前只知道中线
,所以不能直接作出
.
②根据第(1)题,获得思路.可以作出边为b,c,2m的
.此作图过程需先做出一条线段等于线段m的两倍,然后依据______作出
.
③在
上截取m得
的中点D,连接
并延长至点C,使得______,可得
.
(3)【迁移运用】请根据上述(1)(2)问的证明和思考过程,直接作出满足下列条件的三角形(保留作图痕迹,不写作法 )若用其他思路,作法正确也可以.作等腰
,满足腰
,底边BC上的高
.
(1)【原题呈现】八年级上册课本P27:如图①,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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b34233772c4c26d6669499d9b1f15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcb0803e134a985e6b444138f75968d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/f9ceac8d-5418-4679-8e39-c67f4028e6fe.png?resizew=245)
(2)【思路探究】如图②,已知线段b,c,m.求作:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df81cda12d7601d58b1d9c7c180c4d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c884a45b56bc34d79273b067c1520b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3be96420ac78c8621fcb47a45514fa8.png)
①已知共顶点两边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5881068127a39caf319492b4177204f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
②根据第(1)题,获得思路.可以作出边为b,c,2m的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
③在
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)【迁移运用】请根据上述(1)(2)问的证明和思考过程,直接作出满足下列条件的三角形(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c716b3f1b224bd45eb797f598b895e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d29972bb7e1da354a460f22f7516805a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/6bf45a46-3e72-4bf0-a469-bfe10933a598.png?resizew=91)
您最近一年使用:0次
6 . 在研究三角形中点或中线问题时,常采用延长中线一倍的办法,此法称为:倍长中线.
(1)【原题呈现】八年级上册课本P27:如图①,在
中,
是
边上的中线,点
在
的延长线上,且
.请证明:
.
(2)【思路探究】如图②,已知线段
.求作:
,使
边上的中线
.请完善以下作图思路,并填写相应的作图依据.
①已知共顶点两边
,要想作出
,还需要知道
或
.若知道
,则可以根据______作出符合条件的
;若知道
,则可以根据______作出符合条件的
;但目前只知道中线
,所以不能直接作出
.
②根据第(1)题,获得思路.可以作出边为
的
.此作图过程需先做出一条线段等于线段
的两倍,然后依据______作出
.
③在
上截取
得
的中点
,连接
并延长至点
,使得______,可得
.
(3)【迁移运用】请根据上述(1)(2)问的证明和思考过程,直接作出满足下列条件的三角形(
)若用其他思路,作法正确也可以.
作等腰
,满足腰
,底边
上的高
.
(1)【原题呈现】八年级上册课本P27:如图①,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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b34233772c4c26d6669499d9b1f15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcb0803e134a985e6b444138f75968d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/f9ceac8d-5418-4679-8e39-c67f4028e6fe.png?resizew=245)
(2)【思路探究】如图②,已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7f443b7d4efacaaf46340a1fe65ef8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75599be9315048da76c2ccd4aa495605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3be96420ac78c8621fcb47a45514fa8.png)
①已知共顶点两边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9a415bdb7b4e1e35c18a9e53205392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
②根据第(1)题,获得思路.可以作出边为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3eee4e3576c0b13805aade8173dcbeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
③在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)【迁移运用】请根据上述(1)(2)问的证明和思考过程,直接作出满足下列条件的三角形(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62cf1837d2906eff2cea231333490e4d.png)
作等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c716b3f1b224bd45eb797f598b895e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d29972bb7e1da354a460f22f7516805a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/6bf45a46-3e72-4bf0-a469-bfe10933a598.png?resizew=91)
您最近一年使用:0次
7 . 如图,
和
都是等边三角形,且B、C、D三点共线.
(1)
可以看作是由
绕着点 ,逆时针旋转
得到;
(2)试证明这两个三角形全等.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b265d121f9ebc13671a5719604476a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/6f328caa-4079-4dca-b4b2-30de3598fe58.png?resizew=165)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)试证明这两个三角形全等.
您最近一年使用:0次
解答题-问答题
|
较易(0.85)
|
8 . 如图,已知
,
;②
;③
;④
得到
.你添加的条件是:________.(填序号)
(2)选择(1)中的一种情况进行证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e988754bfacf7d4a5c1b2d079346488a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5d6e7ef3f341fd85acde9f60eaaff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a510a3eb906b3ef0760b0d1723d11ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c226581e14091779321c9fe91160ceef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b69473ad1b7e56af6e45d11b8c01a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d6f0530c49174047e866dbf2ae1ea4.png)
(2)选择(1)中的一种情况进行证明.
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9 . 如图,已知
,若依据“
”证明
,则需增加的一个条件是__________ .
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10-11八年级·湖北黄冈·阶段练习
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10 . 如图:
和
相交于
点,若
,用“
”证明
还需添加的条件是( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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2023-10-30更新
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32卷引用:2011-2012学年湖北省黄冈市蔡河中学八年级第一次模拟测试数学试卷
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