如图,在
中,
,
,边
的垂直平分线
与
交于点
,与
交于点
,连接
.求证:
是等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fd0c6cb0e6f9780f4c1c11654c5702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c941a2d467928ae2f430dd7a97e3fba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/5c9e35ed-05e9-4eb3-af6c-b751f93aef8e.png?resizew=222)
更新时间:2024-02-25 11:34:10
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图,在
中,
,
是
的一个外角.
【实践操作】
根据要求进行尺规作图,并在图中标明相应字母.(保留作图痕迹,不要求写出作法.)
(1)作
的平分线
;
(2)作线段
的垂直平分线,与
交于点
,与
交于点
,连接
,
;
【探究计算】
(3)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/338f745e-bec7-4b47-8d56-ceaaf526c517.png?resizew=151)
【实践操作】
根据要求进行尺规作图,并在图中标明相应字母.(保留作图痕迹,不要求写出作法.)
(1)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(2)作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
【探究计算】
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3af84da155bf0f02374cd70ea6eab796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知:在
中,
,线段
的垂直平分线交
于点
,点
在
上,且
,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b0ef0c52151187f9e6006407d45686a.png)
如图1 ,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802ba50f06c473fc74bfac60c5f2f42c.png)
![](https://img.xkw.com/dksih/QBM/2020/6/15/2485453617750016/2491054959230976/STEM/f0dddcc3041b4fd487228ecf0c6ccf53.png?resizew=282)
如图2,当
时.在不添加任何辅助线情况下,请直接写出图2中的四个等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68d1411b29141ea7fc377b44ad92611.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/8455657dde27aabe6adb7b188e031c11.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/d4e92f48e9bfe12d145f7d2a2f0360d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b0ef0c52151187f9e6006407d45686a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802ba50f06c473fc74bfac60c5f2f42c.png)
![](https://img.xkw.com/dksih/QBM/2020/6/15/2485453617750016/2491054959230976/STEM/f0dddcc3041b4fd487228ecf0c6ccf53.png?resizew=282)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2807a96fb088902f1f0ee26e380d2efe.png)
![](https://img.xkw.com/dksih/QBM/2020/6/15/2485453617750016/2491054959230976/STEM/62ec9a92d4b14aa9a533a3bf2ead5cbe.png?resizew=255)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图①,△ABC中,∠ABC,∠ACB的平分线交于O点,过O点作BC平行线交AB,AC于E,F.
(1)试说明:EO=BE;
(2)探究图①中线段EF与BE,CF间的关系,并说明理由;
(3)探究图②,△ABC中若∠ABC的平分线与△ABC的外角平分线交于O,过点O作BC的平行线交AB于E,交AC于F,这时EF与BE,CF的关系又如何?请直接写出关系,不需要说明理由.
(1)试说明:EO=BE;
(2)探究图①中线段EF与BE,CF间的关系,并说明理由;
(3)探究图②,△ABC中若∠ABC的平分线与△ABC的外角平分线交于O,过点O作BC的平行线交AB于E,交AC于F,这时EF与BE,CF的关系又如何?请直接写出关系,不需要说明理由.
![](https://img.xkw.com/dksih/QBM/2021/3/18/2680685005225984/2682838740131840/STEM/1f76237d-fd25-471a-8dff-d032da01199a.png?resizew=300)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图,在
中,
.
(1)尺规作图:在
边上取一点
,连接
,使
;
(2)在(1)的条件下,若
,
,试判断
是否为等腰三角形,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f1b4e58d374035caab3500696a4c797.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/9820e06c-218b-45c4-8f45-3849bac33ce8.png?resizew=167)
(1)尺规作图:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7021cf14b4f0c181a90fec967be7244.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/488c69012a691e5ccd64f69d96e75152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53d0e964e1d96594cbdb392a48f05fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
您最近一年使用:0次