已知,和
都是等腰直角三角形,
是
的中点,连接
.
(1)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65183d238c9bc2be73770717d890683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78bdc0901946ce47761b697fe1d3c09.png)
①在图2中,按要求补全图形,并证明;
②连接,交
于点
.判断线段
与
的数量关系,并证明.
(3)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a1465fd3835e3907212e120665656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53f0a866c83f0445daae94f21394be39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac3aad3d7b8fe0483577002ea3024ef.png)
更新时间:2024-03-17 15:15:10
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【推荐1】已知:如图,在△ABC中,∠BAC=90°,AB=AC,BD平分∠ABC,交AC于D,AE⊥BD于F,交BC于E.求证:
(1)AB=BE;
(2)∠CAE=
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(3)AD=CE;
(4)CD+CE=AB.
(1)AB=BE;
(2)∠CAE=
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(3)AD=CE;
(4)CD+CE=AB.
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解答题-证明题
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名校
【推荐2】已知:在中,
是
边上的中线,分别以
边、
边为直角边各向外作等腰直角三角形,如图,求证:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/c3044468-646d-4026-9564-cc28caa95882.png?resizew=183)
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】【问题背景】
如图,
.连接
,点E,F在
上,且
,连接
,且
.
【问题探究】
(1)试说明:
:
(2)若
,
①试判断
的形状,并说明理由:
②若
,求
的度数.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c55ee522f41c43253050e92b3c8de31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b8bcdebafe3c356df23ac5ddb1a845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439fbb8974a5f907205d26b47b420bf4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/19/fbc545bc-894c-49db-bec0-380b18a9012f.png?resizew=172)
【问题探究】
(1)试说明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff56ea00ca90825f3d95809de24f639.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c931bbba4e02a2ad4584311896738f33.png)
①试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df7626240940eb340420a605e95aeee.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2997a1f93e64edb331481b5a1f7fdbeb.png)
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解答题-证明题
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解题方法
【推荐2】模型探究:
![](https://img.xkw.com/dksih/QBM/2021/11/29/2861731595165696/2863224996593664/STEM/d7dc3e6e-ec89-471b-b2f7-5c397c56b4c7.png?resizew=472)
(1)如图1,在等腰直角三角形
中,
,
,直线
经过点
,过
作
于点
,过
作
于点
.求证:
;
模型应用:
(2)已知直线
与坐标轴交于点
、
,将直线
绕点
逆时针旋转90°至直线
,如图2,求直线
的函数表达式;
(3)如图3,已知点
、
在直线
上,且
.若直线与
轴的交点为
,
为
中点.试判断在
轴上是否存在一点
,使得
是以
为斜边的等腰直角三角形.
![](https://img.xkw.com/dksih/QBM/2021/11/29/2861731595165696/2863224996593664/STEM/d7dc3e6e-ec89-471b-b2f7-5c397c56b4c7.png?resizew=472)
(1)如图1,在等腰直角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323b786e35c9b762d00f2b2ef74ce1d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c388d0a3f0a8d9fb0b9576d00af225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5c60ab4cdefda079244161bb911a453.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024dc2ccbbe321774df5d44e8785b203.png)
模型应用:
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/993ba65e4eee11c93582a5bb796b911e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(3)如图3,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次