【教材呈现】下面是华师版八年级上册数学教材96页的部分内容:已知:如图,
是
的平分线,点
是
上的任意一点.
,
,垂足分别为点
和点
.求证:
.
分析:图中有两个直角
和
,只要证明这两个三角形全等,便可证得
.
(1)【问题解决】请根据教材分析,结合图①写出证明过程.
(2)【类比探究】
如图②,
是
的平分线,
是
上任意一点,点M、N分别在
、
上,连接
和
,若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3224457d394d71df7d2955be6149dea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c70aa83794b41e477e7b546ecbe435ed.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/374e2198b495b86b0f8308d28035a3db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/31/ce5949b8-b321-417f-92d5-c122c55d1a29.png?resizew=543)
分析:图中有两个直角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45361096fc267991b41887b1c13de0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512c99bf25653a93764585942a6fd307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374e2198b495b86b0f8308d28035a3db.png)
(1)【问题解决】请根据教材分析,结合图①写出证明过程.
(2)【类比探究】
如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89cfa58105e86ffb2b5cdcdab52d72d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4acd79bb9fb06f7c806eb6e17e4b613.png)
22-23八年级上·山西临汾·阶段练习 查看更多[3]
山西省临汾市部分学校2022-2023学年八年级上学期第二次月考数学试题(已下线)专题2.8 角的轴对称性(分层练习)-2023-2024学年八年级数学上册基础知识专项突破讲与练(苏科版)江苏省徐州市丰县创新外国语学校2023-2024学年八年级上学期第一次质量检测数学试题
更新时间:2023-07-19 11:33:17
|
相似题推荐
解答题-证明题
|
较易
(0.85)
【推荐1】如图,已知AB
CF,D是AB上一点,DF交AC于点E,DE=EF.求证:AB=BD+CF.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://img.xkw.com/dksih/QBM/2020/10/17/2572717773873152/2573164905160704/STEM/cbd717b975374b3680b9f21eef342ebe.png?resizew=163)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】如图,BD是△ABC中∠ABC的平分线,
于点E ,
于点F,若DE=3,AB=7,BC=9,求△ABC的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d276d0010fd458383ea3dd61415e1aa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/27/89512533-9550-426e-9c0d-fb8ad1579c76.png?resizew=191)
您最近一年使用:0次
解答题-作图题
|
较易
(0.85)
名校
【推荐2】在
中,
.
![](https://img.xkw.com/dksih/QBM/2020/11/24/2599814752641024/2601116150874112/STEM/fac26603-835a-4057-807d-da99dd550595.png)
(1)作线段
的垂直平分线,交
于点
,交
于点
(不要求写作法,保留作图痕迹).
(2)连接
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30e5c7dad9a1dae23f47f67fc03eff61.png)
![](https://img.xkw.com/dksih/QBM/2020/11/24/2599814752641024/2601116150874112/STEM/fac26603-835a-4057-807d-da99dd550595.png)
(1)作线段
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df34369163e511f14028168cb0b21186.png)
您最近一年使用:0次