已知
(如图),用三种不同的方法作
,使
.你认为哪一种作法比较简便?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3199797df195c03880377e578cdb98f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f9eee4cb3e2be70c42786a36027fdf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/3a4e7ce4-cc3d-4739-979a-53a63e3a974a.png?resizew=153)
22-23八年级上·全国·课后作业 查看更多[1]
(已下线)【浙教版课时练习】八年级上册1.6 尺规作图
更新时间:2022-11-29 06:37:22
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解答题-作图题
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【推荐1】作图题(要求:用尺规作图,保留作图痕迹,不写作法)
已知:如图,线段a,c,
.
求作:
,使得
.
已知:如图,线段a,c,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
求作:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433a41c2c390276d45e0faf59dcdd18a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/8250eb8e-b83c-4103-949e-64d89287e289.png?resizew=186)
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【推荐2】如图,在
中,
,D为AB边上一点、尺规作图.作
,使
,且
,点E在
外.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f049838ffab18ad276039ef8fa1fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75dfe7a0510168ecdc3fb99f1f41f173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62dcef170114cd71b99f6646d364ef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/c7e32bac-b359-4a3a-afaf-5442b9b810e0.png?resizew=226)
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解答题-作图题
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【推荐1】如图,方格纸中的△ABC的三个顶点分别在小正方形的顶点(格点)上,请在方格纸上按下列要求画图.
(1)在图①中画出与△ABC全等且有一个公共顶点的△A′B′C′;
(2)在图②中画出与△ABC全等且有一条公共边的△A″B″C″.
(1)在图①中画出与△ABC全等且有一个公共顶点的△A′B′C′;
(2)在图②中画出与△ABC全等且有一条公共边的△A″B″C″.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/64d924fb-378c-4d06-9a59-3b7c06ab9dc4.png?resizew=386)
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【推荐2】已知:如图,点B,F,C,E在一条直线上,AB=DE,AC=DF,BF=EC.求证:
ABC≌
DEF.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/2021/1/22/2641521654898688/2644481103290368/STEM/3ad45743-4be4-46d5-b9d1-4912d78f75bf.png)
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解答题-证明题
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【推荐1】如图1,△ABC中,AD是∠BAC的平分线,若AB=AC+CD,那么∠ACB与∠B有怎样的数量关系?
小明通过观察分析,形成了如下解题思路:如图2,延长AC到E,使CE=CD,连接DE.进而得到△ABD≌△AED,便可得到∠ACB与∠B的数量关系.请结合小明的思路,写出两个角的数量关系,并证明结论.
小明通过观察分析,形成了如下解题思路:如图2,延长AC到E,使CE=CD,连接DE.进而得到△ABD≌△AED,便可得到∠ACB与∠B的数量关系.请结合小明的思路,写出两个角的数量关系,并证明结论.
![](https://img.xkw.com/dksih/QBM/2020/7/24/2512850744713216/2513596780077056/STEM/0ed4ae8e1e864027a4b132b88dbf15ad.png?resizew=325)
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【推荐2】如图,B为线段
上一点,以
,
为腰分别作等腰
和等腰
,
,
,
,连接
交
于点F,连接
交
于点G,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/2ae77d71-ce1c-4201-9862-7eef76480e27.png?resizew=190)
(1)求证:
.
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7372745342e507f47de35243c451b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226c231c1150e27c34eb787a46b02ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b4157345e6b5ddee34c82f8e3a3710.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/2ae77d71-ce1c-4201-9862-7eef76480e27.png?resizew=190)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ff124604fe1e16405e9e835f459794.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d98ed618fc3584cdad1936bfd27b6cd.png)
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解答题-证明题
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【推荐1】如图,已知
.请将下列说明
的理由补充完整.
![](https://img.xkw.com/dksih/QBM/2021/11/8/2846870184886272/2850268261875712/STEM/98a2e415-5c59-4e98-a208-d97879abed35.png)
证明:
(已知)
∴___________________(两直线平行,内错角相等)
又
(已知)
∴___________________(等式的性质)
在
和
中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb638f238469db61d387f61c54bad7c.png)
(___________)
(全等三角形的对应边相等).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c0c8ff8f3584ed3294e8da5192d9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://img.xkw.com/dksih/QBM/2021/11/8/2846870184886272/2850268261875712/STEM/98a2e415-5c59-4e98-a208-d97879abed35.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a22de6112739ea390821b5280f2568.png)
∴___________________(两直线平行,内错角相等)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e3566b290df69bb5f10831037baf77.png)
∴___________________(等式的性质)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f15ba851a0f65c271ec774095516f07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb638f238469db61d387f61c54bad7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f66084460decf7303d46ae13decd132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb32f2d5c9fb0227f67dce1a912a399.png)
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【推荐2】如图,点E是∠AOB的平分线上一点,EC⊥OA,ED⊥OB,垂足分别为C、D.
求证:(1)∠ECD=∠EDC;
(2)OC=OD.
求证:(1)∠ECD=∠EDC;
(2)OC=OD.
![](https://img.xkw.com/dksih/QBM/2021/7/23/2770590316118016/2787371084259328/STEM/b1302097-0e03-4c77-9d84-0ab7c9a20207.png?resizew=251)
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