在△ABC和△AED中,AC交DE于点O,
,
,
,连接BE,CD.
(1)如图1,求证:
;
![](https://img.xkw.com/dksih/QBM/2022/1/6/2895528172240896/2958737065336832/STEM/393393e1-6ebd-4bb6-9826-58abcb724c9f.png?resizew=239)
图1
(2)如图2,延长DE交BC于点F,若
,求∠AEB的度数;
![](https://img.xkw.com/dksih/QBM/2022/1/6/2895528172240896/2958737065336832/STEM/c6ecf824-1d9e-4ed0-b5bf-b2b82fa144dc.png?resizew=246)
图2
(3)如图3,在(2)的条件下,当
时,过点C作
交DF于点P,若
,求△FCP的面积.
![](https://img.xkw.com/dksih/QBM/2022/1/6/2895528172240896/2958737065336832/STEM/189e43f3-9f1b-4852-8a83-a147ba8bd006.png?resizew=256)
图3
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd34a9d150aff3aa789230d7772384a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024dc2ccbbe321774df5d44e8785b203.png)
![](https://img.xkw.com/dksih/QBM/2022/1/6/2895528172240896/2958737065336832/STEM/393393e1-6ebd-4bb6-9826-58abcb724c9f.png?resizew=239)
图1
(2)如图2,延长DE交BC于点F,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2abd5f0e761f76e970f2e9298276d66.png)
![](https://img.xkw.com/dksih/QBM/2022/1/6/2895528172240896/2958737065336832/STEM/c6ecf824-1d9e-4ed0-b5bf-b2b82fa144dc.png?resizew=246)
图2
(3)如图3,在(2)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39320d3c989a7be12eaa993d84befd1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64e0206b1814c35cc96bd2b6b12239a.png)
![](https://img.xkw.com/dksih/QBM/2022/1/6/2895528172240896/2958737065336832/STEM/189e43f3-9f1b-4852-8a83-a147ba8bd006.png?resizew=256)
图3
更新时间:2022-04-15 15:48:52
|
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适中
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【推荐1】如图,C在OB上,E在OA上,∠A=∠B,AE=BC.求证:AC=BE.
![](https://img.xkw.com/dksih/QBM/2020/1/2/2368181335457792/2368614298353664/STEM/a9b9641ea683493f8ffccbbdc19083b6.png?resizew=127)
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【推荐2】在正方形中,P是边
上一动点(不与点B、C重合)连接
.
(1)如图①,过点B作
垂足为点O,交
于点Q,求证:
;
(2)如图②,E是
上的一点,过点E作
,分别交
于点M,N.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/22/e6974e6a-fd2e-4f74-be07-0b6f5428cdcc.png?resizew=319)
(1)如图①,过点B作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0cfc81f5df5b164223424a6b2370714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31daab54010841a7d2bb7f564c22b8e0.png)
(2)如图②,E是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcabbb4a3204d94675ce39838e13c3af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b79c80cc81b5446dfac3ee97b03c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a6af773a381bbd47925d20acaf3224.png)
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名校
【推荐1】如图,正方形
的边长是3,
、
分别在
、
的延长线上,且
,连接
、
交于点
,分别与边
,
交于点
,
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/20/770d5ea8-0f59-410b-84ef-21ab91281615.png?resizew=146)
(1)求证:
;
(2)求证:
;
(3)当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/7cdc346d78b31a196d99e910b39469e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/20/770d5ea8-0f59-410b-84ef-21ab91281615.png?resizew=146)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a45db9d2febc48ac747c244729e8927.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a876984db6251af7f49b9b000bf75e.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d10f2db7289ff1ec65c47d9af77a9c0.png)
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【推荐2】已知:如图,点B、C、D、E在一条直线上,∠B=∠E,AB=EF,BD=EC.求证:
(1)△ABC≌△FED;
(2)AC
FD.
(1)△ABC≌△FED;
(2)AC
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dbfed4adc6b576f875ce75e35ed4b34.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/58051e9c-28e1-44eb-a3b1-68c885ff0a02.png?resizew=200)
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【推荐1】如图,
为
直径,点
为圆上一点,
是
的中点,连接
交
于点
,过
作
的切线交
的延长线于点
.
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f66f5efdb68ef98abb8d232b54b0c9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b20cd1a43264e4533d4980c99fdad4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/789d7031525291f0542e3061f473dbdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,正方形
中,点
,
,
,
分别在
、
、
、
边上,且
,垂足为
,连接
、
,
,
,
.
(1)求证:点
、
、
三点共线;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cafbe2751f4f4c5a8e676818195e9111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d982f09bd3cabd60a5714eb95cd165.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/14/27540402-034f-4c97-b3dc-99ffb0963a82.png?resizew=183)
(1)求证:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad71aa165922fa371f0431af725066b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a68b98e263469404b628639f57a31a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
您最近一年使用:0次