如图,
中,
,
垂直平分
,交
于点
,交
于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/e12907e0-7ae0-474a-8fd2-e36c12265eea.jpg?resizew=210)
(1)求证:
;
(2)若
,
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/be5fc6ead6416492c231c320a5486f86.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/e12907e0-7ae0-474a-8fd2-e36c12265eea.jpg?resizew=210)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88dc4d22c2c289f6d4494b9c2be84407.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
更新时间:2022-01-25 16:19:32
|
相似题推荐
解答题-作图题
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适中
(0.65)
【推荐1】菱形是一个比较有美感的图形,小明学习了菱形后非常喜欢菱形的美,想在下图的
中画出一个菱形.已知
是
的角平分线,他认真思考后在
中按以下步骤作图:
①分别以A,D为圆心,大于
的长为半径画弧,两弧交于M,N两点;
②作直线
分别交
,
于点E,F;
③连接
,
.
(1)根据小明的作图步骤,请用直尺和圆规,按以上步骤完成作图;(保留作图痕迹)
(2)小明作出的四边形
是菱形吗?如果是,请证明;如果不是,请说明理由.
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①分别以A,D为圆心,大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cb1a4c5afb590c7c17de14d15651e1.png)
②作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
③连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/3/6406c28a-863c-4a38-a272-ee8b3da0e5fe.png?resizew=165)
(1)根据小明的作图步骤,请用直尺和圆规,按以上步骤完成作图;(保留作图痕迹)
(2)小明作出的四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a61d8bedef61745ee4fd89a8c0c119.png)
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解答题-作图题
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名校
【推荐2】新定义:若一个点四边形的一条对角线把该四边形分成两个等腰三角形,那么称这个四边形为“等腰四边形”,这条对角线称为“界线”.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/25/fd0da019-0ab6-49d6-8882-099919722f46.png?resizew=203)
(1)如图,四边形
是“等腰四边形“,BD 为“界线”,若
,
,则
.
(2)四边形
是“等腰四边形”,
为“界线”,若
,
,则
.
(3)若在“等腰四边形”
中,
,
,且
为“界线”,请你画出满足条件的图形,并直接写出
的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/25/fd0da019-0ab6-49d6-8882-099919722f46.png?resizew=203)
(1)如图,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b261d5c8b713e6a1d9daba6552395497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4db07c6ce6c8b0e96a3470c6a3491334.png)
(2)四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee18af1c3aabca1b14a5423e8ae5d74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b261d5c8b713e6a1d9daba6552395497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4db07c6ce6c8b0e96a3470c6a3491334.png)
(3)若在“等腰四边形”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce072bcd423b56c827e40f0b731de85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,在△ABC中,AB=AC,点P是边BC上的中点,PD⊥AB,PE⊥AC,垂足分别为点D、E.
![](https://img.xkw.com/dksih/QBM/2020/3/31/2431454823530496/2432112777650176/STEM/618bf83fc54d4514971cb27c3d611db7.png?resizew=111)
(1)求证:PD=PE;
(2)若AB=6cm,∠BAC=30°,请直接写出PD+PE= cm.
![](https://img.xkw.com/dksih/QBM/2020/3/31/2431454823530496/2432112777650176/STEM/618bf83fc54d4514971cb27c3d611db7.png?resizew=111)
(1)求证:PD=PE;
(2)若AB=6cm,∠BAC=30°,请直接写出PD+PE= cm.
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐2】(1)问题发现:如图①,
和
均为等边三角形,点
在边
的延长线上,连接
,求证:
.
(2)类比探究:如图②,
和
均为等腰直角三角形,
,
点在边
的延长线上,连接
.
①求
的度数;
②判断线段
,
,
之间的数量关系并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52273305805769a438772342b53c289e.png)
(2)类比探究:如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26813466e2ee49a493881a4384fc8748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2db6311e228ed33b6c71d0a5918cf.png)
②判断线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/6/1b93b410-60b0-409b-b057-431605fd6bdd.png?resizew=287)
您最近一年使用:0次
解答题-作图题
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适中
(0.65)
【推荐1】一块含有
角的三角板
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,
,
.将此三角板在平面内绕顶点
旋转一周.
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(1)画出边
旋转一周所形成的图形;
(2)求出该图形的面积.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
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(1)画出边
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(2)求出该图形的面积.
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,将矩形纸片
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边的点F处.若
,
.
的长;
(2)直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26ad70d2b3aac8604834d57dfc59bb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(2)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次