如图,点C是∠AOB角平分线上一点,过点C作CF⊥OA,CG⊥OB,垂足分别为F,G,点D为OA上的点,点E为OB上一点,若点C刚好又是线段DE垂直平分线上的点.求证:∠FDC=∠CEG.
![](https://img.xkw.com/dksih/QBM/2020/2/19/2409419774001152/2433125068062720/STEM/21976669a64b4be182426eeba2d5caa8.png?resizew=165)
18-19八年级下·广东深圳·期中 查看更多[3]
广东省深圳市龙岗区2018-2019学年八年级下学期期中数学试题广东省深圳市龙岗区横岗中学2020-2021学年八年级下学期第一次月考数学试题(已下线)专题05 角平分线与线段垂直平分线综合-【微专题】2022-2023学年八年级数学下册常考点微专题提分精练(北师大版)
更新时间:2020-04-03 01:08:32
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知:如图,AB⊥BC,DC⊥BC,B、C分别是垂足,DE交AC于M,BC=CD,AB=EC,DE与AC有什么关系?请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/25e0543d-c3b0-420d-a5c3-cc6b1b95bfb0.png?resizew=116)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐2】如图,在长度为1个单位长度的小正方形组成的正方形中,点A、B、C在小正方形的顶点(格点)上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/aa3698ad-2e58-4861-96f8-4e70609caa60.png?resizew=195)
(1)在图中画出与△ABC关于直线l成轴对称的
;
(2)在图中确定点P,使得点P到点A、C的距离和最小;
(3)顶点在格点,与△ABC全等且仅有1条公共边,这样的三角形共能画出 个.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/aa3698ad-2e58-4861-96f8-4e70609caa60.png?resizew=195)
(1)在图中画出与△ABC关于直线l成轴对称的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
(2)在图中确定点P,使得点P到点A、C的距离和最小;
(3)顶点在格点,与△ABC全等且仅有1条公共边,这样的三角形共能画出 个.
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图,在
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/19ba5f7f-9301-41b4-ada6-70c8ef1be4e2.png?resizew=229)
(1)用直尺和圆规作
的平分线,交
于点
;(要求:不写作法,保留作图痕迹)
(2)用直尺和圆规作
的平行线
,使
经过点
;(要求:不写作法,保留作图痕迹)
(3)由作图可知,
的依据是______.延长
交
于点
,可得
的依据是______.
(4)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/19ba5f7f-9301-41b4-ada6-70c8ef1be4e2.png?resizew=229)
(1)用直尺和圆规作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)用直尺和圆规作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)由作图可知,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31307b00524e461b0ad8dfbcdf24bacf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0105d0889f6fa9cb5430cf9e09337173.png)
(4)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3793aee5108c70b5bad770f90589e3.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在
中,
平分
,
,
于点E,点F在
上,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/8f140671-c7e5-40a9-9bf3-08f9bea41bd3.png?resizew=126)
(1)求证:
.
(2)若
,
,求
的长.
![](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/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b9f98fe35d1baada6fa249d117363e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/8f140671-c7e5-40a9-9bf3-08f9bea41bd3.png?resizew=126)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212125c9527ce3c18db6ca7d05902d23.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630b9ca3d20635161fa8fbf812b9128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b74e2b6dae540571fdd509c4e966b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】 问题解决:(1)如图1,在四边形
中,A为
上一点,且
,若
,则求证:
.
拓展探究:(2)如图2,A、B为线段
的垂直平分线上两点,且
,过点B作
于E点,
的垂直平分线交
于F点,连
、
.试求
的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/27/1b9ab2a5-3e44-40ff-85e0-8130cc9091ac.png?resizew=311)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0236057a550cb5ff02dedd15e1c48f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a6574405000dab3fec93b438aa2de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
拓展探究:(2)如图2,A、B为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90026b96116424a245b335b1adb886b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/27/1b9ab2a5-3e44-40ff-85e0-8130cc9091ac.png?resizew=311)
图1 图2
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】和平公园是太原市的大型综合性公园,以“自然生态、和谐共融”为主题,公园内有一块四边形
的草坪
如图所示
,在该四边形内有一棵银杏树,银杏树的位置点
到边
、
的距离相等.并且点
到点
、
的距离也相等,请用尺规作出银杏树的位置点
(不写作法.保留作图痕迹)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f7b7eda05e7107a89f7c597e3a6170.png)
![](https://img.xkw.com/dksih/QBM/2022/12/26/3139425356308480/3140482271559680/STEM/6712cf2af8344998aa47b14d61b4dfb1.png?resizew=177)
您最近一年使用:0次