![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ba4fd3965cfaa4ee0c734297d6fa02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/fa423d62-74e0-40bb-9500-911e92a28322.png?resizew=455)
(1)在图1,利用直尺和圆规作斜边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6edee6c753fdbdabb111a898cbe5ae2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d21fa3492cd1ac2b3f9278d3fe4cd4fd.png)
(3)图2中D、E分别是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f16a3e7bb38f17995ce024de5ab09.png)
更新时间:2022-10-23 09:13:20
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解答题-证明题
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适中
(0.65)
【推荐2】已知:如图,BC∥EF,AD=BE,BC=EF,
![](https://img.xkw.com/dksih/QBM/2019/11/7/2328870599024640/2329557741142016/STEM/2db3600fa1d4439b88953efe8a5123eb.png?resizew=174)
求证:(1)△ABC≌△DEF.
(2)AC∥DF.
![](https://img.xkw.com/dksih/QBM/2019/11/7/2328870599024640/2329557741142016/STEM/2db3600fa1d4439b88953efe8a5123eb.png?resizew=174)
求证:(1)△ABC≌△DEF.
(2)AC∥DF.
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解答题-作图题
|
适中
(0.65)
【推荐1】如图,AC是▱ABCD的对角线,CE⊥AD,垂足为点E.
![](https://img.xkw.com/dksih/QBM/2019/6/20/2229588818239488/2231164257443840/STEM/75d123c373cf4c82b9754222369f38a8.png?resizew=142)
(1)用尺规作图作AF⊥BC,垂足为F(保留作图痕迹);(2)求证:△ABF≌△CDE.
![](https://img.xkw.com/dksih/QBM/2019/6/20/2229588818239488/2231164257443840/STEM/75d123c373cf4c82b9754222369f38a8.png?resizew=142)
(1)用尺规作图作AF⊥BC,垂足为F(保留作图痕迹);(2)求证:△ABF≌△CDE.
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解答题-作图题
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适中
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【推荐2】如图,
在直线l的左侧,请按以下要求作出相应的图形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/f92717b7-8bdc-439a-82ec-6d823a4d4779.png?resizew=235)
(1)作出
关于直线l成轴对称的图形
;
(2)用直尺和圆规作出
的
边上的中线.(保留作图痕迹)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/f92717b7-8bdc-439a-82ec-6d823a4d4779.png?resizew=235)
(1)作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
(2)用直尺和圆规作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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解答题-证明题
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适中
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【推荐1】如图,在△ABC中,AB=AC,D为BC的中点,DE⊥AB于E,DF⊥AC于F.求证:AD⊥EF.
![](https://img.xkw.com/dksih/QBM/2020/6/10/2481750836830208/2484530859057152/STEM/d5c5cb6f6fd548e4a80ed9700cd3736b.png?resizew=152)
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解答题-证明题
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适中
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名校
【推荐2】已知,如图,在△ABC 中,AD 平分∠BAC,AD=AB,CM⊥AD 于 M,请你通过观察和测量,猜想线段 AB、AC 之和与线段 AM 有怎样的数量关系,并证明你的结论.
![](https://img.xkw.com/dksih/QBM/2019/11/10/2330904645869568/2331616315310080/STEM/85638e0a4ba046de826bb3acb6ef5a22.png?resizew=138)
您最近一年使用:0次
解答题-问答题
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适中
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【推荐1】如图,已知∠AOB,点P是∠AOB内部的一个定点,点E、F分别是OA、OB上的动点.
![](https://img.xkw.com/dksih/QBM/2017/12/1/1829272047517696/1830444924526592/STEM/08015420f02540fea906bdb315752120.png?resizew=104)
(1)要使得△PEF的周长最小,试在图上确定点E、F的位置.
(2)若OP=4,要使得△PEF的周长的最小值为4,则∠AOB=________.
![](https://img.xkw.com/dksih/QBM/2017/12/1/1829272047517696/1830444924526592/STEM/08015420f02540fea906bdb315752120.png?resizew=104)
(1)要使得△PEF的周长最小,试在图上确定点E、F的位置.
(2)若OP=4,要使得△PEF的周长的最小值为4,则∠AOB=________.
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解答题-问答题
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适中
(0.65)
【推荐2】在
中,
,将
绕点A顺时针方向旋转
角
至
的位置.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/9e40dfef-d7e3-4244-a9ab-5e20d041b899.png?resizew=254)
(1)如图1,当旋转角为
时,连接
与
交于点
,则
.
(2)如图2,在(1)条件下,连接
,延长
交
于点D,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec86b903148761f10ed8e51e10a5f2f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f9a6c380c4f3744c696918cbd41169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c021993da445858448d368df42554c8b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/9e40dfef-d7e3-4244-a9ab-5e20d041b899.png?resizew=254)
(1)如图1,当旋转角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300d29bf2277a510ab443c1e2a55e1bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cd6f5da1481b20cb83998bbc3cc816f.png)
(2)如图2,在(1)条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次