如图1,
是菱形
的对角线,点
是边
上一点,将
沿着
翻折,点
的对应点
恰好落在
的延长线上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/1f29f20d-b536-4032-a8dc-22d4c108126d.png?resizew=308)
(1)求证:
平分
;
(2)如图2,若点
落在
上.
①猜想
与
之间的数量关系,并证明你的结论;
②若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/1f29f20d-b536-4032-a8dc-22d4c108126d.png?resizew=308)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a2e6494cf8d2dff0746a9bb72cef43.png)
(2)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
①猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d786ee723231d4ca87eb9d011a378b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685516a27697104e83b311d76efa17aa.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107aafb813337f2456413a03fe5b6092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed13973ffe158bced45616efee224b6.png)
更新时间:2023-03-06 13:50:11
|
相似题推荐
解答题-证明题
|
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(0.85)
【推荐1】如图.
![](https://img.xkw.com/dksih/QBM/2023/1/6/3146719470411776/3147180694028288/STEM/67e89e2344c84b9d8cba21fb6dd24814.png?resizew=235)
(1)已知
,
、
在线段
上,
与
交于点
,且
,
.求证:
.
(2)已知点
、
在
上,
与
交于点
,
,
,
.求证:
.
![](https://img.xkw.com/dksih/QBM/2023/1/6/3146719470411776/3147180694028288/STEM/67e89e2344c84b9d8cba21fb6dd24814.png?resizew=235)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fec9e3bf7ff287df2cbdff8addfaf5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb27272b4eb9ed057dd3b4d40697e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb27272b4eb9ed057dd3b4d40697e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9da441d03aaaf554fe33d3bf8952331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5bde0d7cc26695cc9198caa516bf450.png)
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解答题-证明题
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【推荐2】已知:如图,在ABC中,CD⊥BC,AC=
BD,CE为BD上的中线,求证:∠A=2∠B。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/16/563e2d85-c166-4746-95be-66e5546c4e60.png?resizew=218)
您最近一年使用:0次
解答题-作图题
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名校
【推荐1】如图是由边长为1的小菱形构成的网格,每个小菱形的顶点称为格点.点A,B均在格点上,请仅用无刻度的直尺.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/d822644f-e63b-4729-b152-b1eda003d3aa.png?resizew=506)
(1)在图1中画出AB的中点O;(保留辅助线,辅助线用虚线)
(2)在图2中画一个Rt△ABC,使点C在格点上.(不写作法,保留作图痕迹)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/d822644f-e63b-4729-b152-b1eda003d3aa.png?resizew=506)
(1)在图1中画出AB的中点O;(保留辅助线,辅助线用虚线)
(2)在图2中画一个Rt△ABC,使点C在格点上.(不写作法,保留作图痕迹)
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解答题-作图题
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【推荐2】如图所示,在
的方格纸中,每个小正方形的边长均为1,线段
的端点
、
均在小正方形的顶点上.
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754191817228288/2773496627044352/STEM/34daa6bd-69dd-424e-9cfc-f628c03d916c.png)
(1)在图中画出以
为边的菱形
,菱形的面积为8;
(2)在图中画出腰长为5的等腰三角形
,且点
在小正方形顶点上;
(3)连接
,请直接写出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d009739b5b5362c7902eeeada94adb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754191817228288/2773496627044352/STEM/34daa6bd-69dd-424e-9cfc-f628c03d916c.png)
(1)在图中画出以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)在图中画出腰长为5的等腰三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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解答题-问答题
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(0.85)
【推荐1】如图1,将长方形纸片
沿
折叠得到图2,点A,
的对应点分别为点
,
,折叠后
与
相交于点
.
,求
的度数.
(2)设
,
.
①请用含
的代数式表示
.
②当
恰好平分
时,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42198b8e646ccfbbec323fd364c4d90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2afdcf125da79be7823d136ade298b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f590d47f2ab4cbbb09d71bc02cd99897.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9d226dc13e23ca8cab3f6e79131edb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1aadc17eb68abbc27cf205b95f28661.png)
①请用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35ee685a6d4799b0ba7e114a3906c0c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbe9b60364e489347f264cc3d8c30e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f590d47f2ab4cbbb09d71bc02cd99897.png)
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解答题-问答题
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【推荐2】如图,将长方形纸片
(
)折叠,使点A与点C重合.折痕与
交于点E,与
交于点F,点
为点D翻折后的对应点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/308b7886-8f48-4780-831c-f41736c0e246.png?resizew=144)
(1)连接
,如果
,求
的度数;
(2)连接
,如果
的面积为s,且
,求长方形
的面积(用含s的代数式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deb6694f3443cc5f4d09948679251b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/308b7886-8f48-4780-831c-f41736c0e246.png?resizew=144)
(1)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f611f5bb08a66cae8fe411e59a1c08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b2b0b223322bd718526ef753f39fec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6a23d521606a35298bbf147f7f830c.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557f8ff92d79a9d464ff13de17f3eae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8bb1e2dbfd5c00e6a5432bb288265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15d6fb09f34b29aaacd34d062fa33f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
解答题-证明题
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【推荐1】如图,在平行四边形
中,连接
,点
在
边上,连接
并延长,交
的延长线于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/6d36a779-f4e7-4f60-82e1-4064ed0bd8e4.png?resizew=148)
(1)求证:
;
(2)如果
,
,求
长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83339bbde0baab5e782b449409f12fb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/6d36a779-f4e7-4f60-82e1-4064ed0bd8e4.png?resizew=148)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b677f920f353da4fa7a54e09ffee5b0.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae8221601c7bd5c51fd520615581fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64e0206b1814c35cc96bd2b6b12239a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次