1 . 如图,工人师傅设计了一种测零件内径
的卡钳,卡钳交叉点O为
,
的中点,只要量出
的长度,就可以道该零件内径
的长度.依据的数学基本事实是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/cb7cc655-2bf2-4cc8-b5a4-cc217693af8d.png?resizew=229)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/cb7cc655-2bf2-4cc8-b5a4-cc217693af8d.png?resizew=229)
A.两边及其夹角分别相等的两个三角形全等 |
B.两角及其夹边分别相等的两个三角形全等 |
C.三边分别相等的两个三角形全等 |
D.两角分别相等且其中一组等角的对边相等的两个三角形全等 |
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2023-12-11更新
|
103次组卷
|
3卷引用:山东省淄博市周村区2023-2024学年七年级上学期期中数学试题
2 . 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)
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3 . 已知:如图,已知
,
,
为线段
上一点,试说明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4009aa13093cc3865dcd51b371892160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ef9500289a895ad4d69f113a11e7525.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/331d55a7-4c78-424a-95b6-21b2d006a6af.png?resizew=138)
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4 . 如图,已知
,
,
,
,求
的度数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee730f6a2551fb1b582ecf290cfea233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6568df44adc0fb5198810bd50d452b88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab41054fa9ce51b68e78d9c0cf398d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a91778530fee017af63165397d36b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44fd16f9eca4fef818a8100435abf9e4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/2bfbf18e-d700-4401-aaa2-a3705b572683.png?resizew=181)
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5 . 如图,在等边
中,
,点P从点A出发沿
边向点B以每秒2个单位的速度移动,点Q从点C出发沿
边向点A以每秒4个单位的速度移动.P,Q两点同时出发,它们移动的时间为t秒.
(1)用含t的代数式表示:
,
;
(2)在点P,Q的运动过程中,是否存在t,使得
与
全等?如果能,请求出t的值;如果不能,请说明理由;
(3)若P、Q两点分别从A、C两点同时出发,并且都按逆时针方向沿
的三边运动,请问经过几秒点P与点Q第一次相遇?并说明相遇的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5685dc4334f1225bc3b62ea645a595d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/28/3e0d4eca-5155-491d-a583-a408b56022c3.png?resizew=169)
(1)用含t的代数式表示:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524f25e1eedbfe399f7f42db890ab89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbc9c4e4db6374d5ba4c5dec8747442.png)
(2)在点P,Q的运动过程中,是否存在t,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
(3)若P、Q两点分别从A、C两点同时出发,并且都按逆时针方向沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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6 . 如图,在
的正方形网格中,每一个小正方形的边长为
,小正方形的顶点为格点,已知
,
,
,
为格点.
(1)试说明
为等腰三角形.
(2)请你仅用无刻度的直尺,在线段
上求作一点
,使得
,并简单说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89900589ac1333e2a87723c2c4469a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/9d9f64ec-9079-4379-869d-69c069fb01ec.png?resizew=122)
(1)试说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)请你仅用无刻度的直尺,在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650abc501b8d26ec0556b168e9ad20df.png)
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7 . 已知:如图,
,
,
,试说明
的道理.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934a9508c176f44bf58f88715bd98f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ddd49625097d0a78df7170be4f882e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e470a25fa7f85c6a1dccb0585e0b3e32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2222ab63f72d1789c180b6e6bec557f8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/498926fd-d43e-41e4-92cf-35d6974b3a7d.jpg?resizew=208)
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8 . 先阅读材料再解决问题.
【阅读材料】
学习了三角形全等的判定方法“SAS”,“ASA”,“AAS”,“SSS”和“HL”后,某小组同学探究了如下问题:“当
和
满足
时,
和
是否全等”.
如图1,这小组同学先画
,再画
.在画
的过程中,先过
作
于点
,发现如下几种情况:
当
时,不能构成三角形.
当
时,根据“HL”或“AAS”,可以得到
.
当
时,又分为两种情况.
①当
时,
和
不一定全等.
②当
时,
和
一定全等.
【解决问题】
(1)对于
的情况,请你用尺规在图2中补全
和
,使
和
不全等.(标明字母并保留作图痕迹)
(2)对于
的情况,请在图3中画图并证明
.
【阅读材料】
学习了三角形全等的判定方法“SAS”,“ASA”,“AAS”,“SSS”和“HL”后,某小组同学探究了如下问题:“当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f350dd038174b7be7dde6afb40bcacd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/46ced53b-0b82-4031-8850-e46ffc7fc9a3.png?resizew=323)
如图1,这小组同学先画
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462e9e3c9fea1f599e5300c842122052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c244edbf77fbb8e9c017515e370c5c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c244edbf77fbb8e9c017515e370c5c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db42df53c19ec108ff95da2410262736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2483b2ed78744b303d71b46da338c0f.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc19864e9a73e8a62074ce2271ebedd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58b99216b6f3125c6e741f5caa39671.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90bf08f55ea104d15ac31395fc07920.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4358f05227bce366da4a21272b5bec9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a4d1e2563c5f0e9df5d6e3785a4d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
【解决问题】
(1)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4358f05227bce366da4a21272b5bec9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/c8e7f98d-1007-454a-b860-18872bc326bb.png?resizew=321)
(2)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a4d1e2563c5f0e9df5d6e3785a4d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac61f3477e623aa4f924a82bd7a06ce4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/08328573-87e4-4032-add1-3feb7d8609cb.png?resizew=321)
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9 . 除了教材例题提供的作角平分线的办法,现在还有一种作法如下:
“在已知
的两边分别截取
,
(点M与点P在同一边上),连接
和
交于D点,画射线
,射线
即为
平分线”.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/23/83fb59bb-d741-48ea-8606-a6fa4aa9a4ef.png?resizew=167)
(1)请在图中按此作法作出射线
;
(2)试说明
的理由.
“在已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2032fccdf9ab12429aae024d67b19d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731016f5081dca7e5726598d757c0449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/23/83fb59bb-d741-48ea-8606-a6fa4aa9a4ef.png?resizew=167)
(1)请在图中按此作法作出射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
(2)试说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b3d202a7578a772bd5c60d22b036bfe.png)
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10 . 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)
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