已知, 如图, 在等边三角形
中, 点 D 是边
中点,
于F, 延长
到E, 使
, 连接
, 求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ac03e0b1559d3a64fefe22b807f6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802240838201171d8762fe92112fa3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b871a762469393cdd22f15aa49ebb8f9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/22/97edf7be-b00d-4faf-9eae-89da2bed7327.jpg?resizew=142)
更新时间:2024-01-22 18:03:26
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解答题-作图题
|
较易
(0.85)
【推荐1】图①、图②均是6×6的正方形网格,每个小正方形的边长均为1,每个小正方形的顶点称为格点,点A、B、C均在格点上,只用无刻度的直尺,分别在给定的网格中找一格点P,按下列要求作图.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/fec89f5c-5d3d-45e0-b9cf-ba8bb0786980.png?resizew=350)
(1)在图①中,连结PA、PB,使PA=PB.
(2)在图②中,连结PA、PB、PC,使PA=PB=PC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/fec89f5c-5d3d-45e0-b9cf-ba8bb0786980.png?resizew=350)
(1)在图①中,连结PA、PB,使PA=PB.
(2)在图②中,连结PA、PB、PC,使PA=PB=PC.
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解答题-作图题
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较易
(0.85)
【推荐2】如图,已知
,利用尺规,根据下列要求作图
保留作图痕迹,不写作法
,并根据要求填空:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/aba9aeef-aaf1-423f-9c7c-058154146e8b.png?resizew=144)
(1)作
的平分线交
于点
;
(2)作线段
的垂直平分线交
于点
,交
于点
,连接
,
.
(3)
与
的位置关系为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/aba9aeef-aaf1-423f-9c7c-058154146e8b.png?resizew=144)
(1)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解答题-作图题
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较易
(0.85)
【推荐1】如图,△ABC,△ADB,△ACE均是等边三角形.请在图1、图2中用不同的方法.仅用无刻度的直尺按要求作图.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/beebc051-d285-43fb-ad4e-b39d94f526be.png?resizew=427)
(1)在图1中,作线段BC的垂直平分线;
(2)在图2中,作线段BC的垂直平分线.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/beebc051-d285-43fb-ad4e-b39d94f526be.png?resizew=427)
(1)在图1中,作线段BC的垂直平分线;
(2)在图2中,作线段BC的垂直平分线.
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