如图,在四边形
中,
,
是
上一点,且
,
,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/430e47c8-deaa-4fad-ac81-647337f306a1.png?resizew=105)
(1)
与
相等吗?为什么?
(2)点
是线段
的中点,连接
、
、
.
①试说明
≌
;
②试判断
与
是否全等,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7b5ea5627440c19999a9039eaa1c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2291de85a2a29ff360a4515cce99c804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62dcef170114cd71b99f6646d364ef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/430e47c8-deaa-4fad-ac81-647337f306a1.png?resizew=105)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
①试说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc7f32e4c7d1fcafc3fe0dbcf08fdd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d64baeab9fbb16ca9e928f6a55e2c0.png)
②试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
更新时间:2022-08-25 21:07:38
|
相似题推荐
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,已知射线OC为∠AOB的平分线,且OA=OB,点P是射线OC上的任意一点,连接AP、BP.
(1)求证:△AOP≌△BOP;
(2)若∠AOB=50°,且点P是△AOB的外心,求∠APB的度数;
(3)若∠AOB=50°,且△OAP为钝角三角形,直接写出∠OAP的取值范围.
(1)求证:△AOP≌△BOP;
(2)若∠AOB=50°,且点P是△AOB的外心,求∠APB的度数;
(3)若∠AOB=50°,且△OAP为钝角三角形,直接写出∠OAP的取值范围.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/5d77686e-5fd7-4ff7-ab4f-4150b70ffa5d.png?resizew=180)
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解答题-作图题
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适中
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名校
【推荐2】先阅读材料再解决问题.
【阅读材料】
学习了三角形全等的判定方法“SAS”,“ASA”,“AAS”,“SSS”和“HL”后,某小组同学探究了如下问题:“当
和
满足
时,
和
是否全等”.
如图1,这小组同学先画
,再画
.在画
的过程中,先过
作
于点
,发现如下几种情况:
当
时,不能构成三角形.
当
时,根据“HL”或“AAS”,可以得到
.
当
时,又分为两种情况.
①当
时,
和
不一定全等.
②当
时,
和
一定全等.
【解决问题】
(1)对于
的情况,请你用尺规在图2中补全
和
,使
和
不全等.(标明字母并保留作图痕迹)
(2)对于
的情况,请在图3中画图并证明
.
【阅读材料】
学习了三角形全等的判定方法“SAS”,“ASA”,“AAS”,“SSS”和“HL”后,某小组同学探究了如下问题:“当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f350dd038174b7be7dde6afb40bcacd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/46ced53b-0b82-4031-8850-e46ffc7fc9a3.png?resizew=323)
如图1,这小组同学先画
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462e9e3c9fea1f599e5300c842122052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c244edbf77fbb8e9c017515e370c5c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c244edbf77fbb8e9c017515e370c5c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db42df53c19ec108ff95da2410262736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2483b2ed78744b303d71b46da338c0f.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc19864e9a73e8a62074ce2271ebedd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58b99216b6f3125c6e741f5caa39671.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90bf08f55ea104d15ac31395fc07920.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4358f05227bce366da4a21272b5bec9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a4d1e2563c5f0e9df5d6e3785a4d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
【解决问题】
(1)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4358f05227bce366da4a21272b5bec9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/c8e7f98d-1007-454a-b860-18872bc326bb.png?resizew=321)
(2)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a4d1e2563c5f0e9df5d6e3785a4d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac61f3477e623aa4f924a82bd7a06ce4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/08328573-87e4-4032-add1-3feb7d8609cb.png?resizew=321)
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名校
【推荐1】如图,D是△ABC的边AB上一点,CF∥AB,DF交AC于E点,DE=EF.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/698ff511-ab84-4db8-9804-7447ae5cbf2e.png?resizew=159)
(1)求证:△ADE≌△CFE;
(2)若AB=6,CF=4,求BD的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/698ff511-ab84-4db8-9804-7447ae5cbf2e.png?resizew=159)
(1)求证:△ADE≌△CFE;
(2)若AB=6,CF=4,求BD的长.
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名校
【推荐2】如图,已知点
,
在线段
上,
,
,
.
求证:
≌
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfaad5f25944b5422c6c7e12071d6417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79d9cc37ac19a35e2bf17921443dbb81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9fa847f893bc238c97ee4e916e5368.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/9e90d7c7-24c8-4456-a69d-62882b182ff3.png?resizew=215)
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解答题-证明题
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(0.65)
【推荐1】如图,在
中,
,
,
,
是
的中线.
是高,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2021/5/28/2730923726249984/2797901342425088/STEM/2b6951dd-f532-4df1-a46a-e5e3c52a9ddf.png)
(1)求
的长;
(2)证明:
是等边三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2021/5/28/2730923726249984/2797901342425088/STEM/2b6951dd-f532-4df1-a46a-e5e3c52a9ddf.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
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【推荐2】如图所示,AB是
的直径,BC是
为O的弦,
的割线
垂直AB于点F,交BC于点G,
.
(1)求证:PC是
的切线;
(2)当
时,求以
的长为根的一元二次方程;
(3)当点C在劣弧
上运动时,应具备什么条件可使结论
成立?试写出你的猜想,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091e86ca89e484b331fd90125a5e5af3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb9410cbaae2d2059ceae5ad5952ea7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/12/53ddb377-e0b5-40c3-b7f1-944c2c0874b0.png?resizew=163)
(1)求证:PC是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e75469e01100ac6df76a415f944e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffe372118912f3568015773765af7aa.png)
(3)当点C在劣弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f9353ca110c8b81561455b232dbc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eddef4c8bd45cd56fa31f1e46d45f23d.png)
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