如图,
、
、
、
在一条直线上,
,
,求证:
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b750a0aeab4974c590b538e009fb3ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17d756fbb2ab90b839959373addbd7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40d4a835472fa987305d4ffb6ecf11e1.png)
更新时间:2024-05-18 08:16:14
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解答题-证明题
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【推荐1】如图,已知AE⊥BC,FG⊥BC,∠1=∠2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/870818ad-a658-49bd-9adc-187e8c5247de.png?resizew=297)
(1)求证:AE∥FG;
(2)①求证:AB∥CD;
②若∠ABD=100°,求∠D.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/870818ad-a658-49bd-9adc-187e8c5247de.png?resizew=297)
(1)求证:AE∥FG;
(2)①求证:AB∥CD;
②若∠ABD=100°,求∠D.
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【推荐2】已知:
,P为平面内任意一点,连接
.
,则
的度数为_____;(直接写出答案)
(2)拖动点P至如图2所示的位置时,试判断
和
之间的数量关系,并证明;
(3)在(2)的条件下,设点E为
延长线上一点,作
和
的角平分线交于点Q,请你试写出
与
之间的数量关系,并简要说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384438c5fe01746c04b73701b8eb8206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4103ba87266bceeb3ba11ac9bf49c8e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3c1375c64dceef45846308a418cf7f.png)
(2)拖动点P至如图2所示的位置时,试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d2e4e7730336cd9eae07b1469924e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3c1375c64dceef45846308a418cf7f.png)
(3)在(2)的条件下,设点E为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060705794ef87cc71dac40c57f27b1d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d221944148d71e2e1bc76040aefb8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3c1375c64dceef45846308a418cf7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50677b86ad4d651238d26934175f133.png)
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【推荐1】如图在
中,D是
边上的一点,
,
平分
,交
边于点E,连接
.
;
(2)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec2c1f3a53a2c5bf175dc9093be83f7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be28a89d6d899b5da865d0088c4adc16.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3824d1f95411731422d6b328fcf10cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5d3f1c7f7ffdf572978468d5a3adde.png)
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【推荐2】如图,
是
边
的中点,连接
并延长到点
,使
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/8f735c47-1afb-45a5-bd5b-338dd29845c6.png?resizew=181)
(1)求证:
;
(2)若
的面积为4,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad98ad714864041a632ca949308e417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/8f735c47-1afb-45a5-bd5b-338dd29845c6.png?resizew=181)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01ccfa50b9cfcffc453c323d028571e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
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