请在①
;②
;③
这三个条件中任选一个补充在下面题目的横线上使之成为真命题,并解答出后面的问题.
(1)已知,如图,四边形BEDF是平行四边形,点A、C在对角线EF所在的直线上,______(填写序号).
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986302181580800/2990562508955648/STEM/a677f641cdde4fafb9f38987523091ee.png?resizew=154)
求证:
;
(2)连接AD、BC,若AC平分∠BAD,已知
,
.求四边形ABCD的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
(1)已知,如图,四边形BEDF是平行四边形,点A、C在对角线EF所在的直线上,______(填写序号).
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986302181580800/2990562508955648/STEM/a677f641cdde4fafb9f38987523091ee.png?resizew=154)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d99bb3ab66b8884bf23cffe1bddcb33.png)
(2)连接AD、BC,若AC平分∠BAD,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b74e2b6dae540571fdd509c4e966b8.png)
2022·江苏扬州·二模 查看更多[3]
更新时间:2022-05-30 14:57:54
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解答题-证明题
|
适中
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名校
【推荐1】(1)如图①,在
和
中,
,
且
,求证:
;
(2)如图②,在
和
中,
,
,且
,点
、点
均在
外,连接
交于点
,连接
,求证:
平分
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/23/5647614d-7b70-4b41-9fa6-8333556086a5.png?resizew=76)
(2)如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8abfdaab699cfe51bb9678110ad6aee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502b2e185cf1eede6730577e6924e486.png)
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【推荐2】已知:如图,四边形ABCD中,连接AC,AB=AC,∠BAC+∠ACD=180°,点E是边AD上一点,连接BE交AC于点F,且∠D+2∠AFB=180°.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/fcd17062-177b-4eb3-a90b-2424cf1744e4.png?resizew=405)
(1)探究∠ABC与∠ACD的数量关系,并证明你的结论;
(2)求证:AD=AF+CD;
(3)当∠BAC=90°,
,
时,求BF的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/fcd17062-177b-4eb3-a90b-2424cf1744e4.png?resizew=405)
(1)探究∠ABC与∠ACD的数量关系,并证明你的结论;
(2)求证:AD=AF+CD;
(3)当∠BAC=90°,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f39fdcf98775b0a4960d6bc870eddfc.png)
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【推荐1】如图1,把两个边长为1的小正方形沿对角线剪开,所得的4个直角三角形拼成一个面积为2的大正方形.由此得到了一种能在数轴上画出无理数对应点的方法.
(2)请你参照上面的方法
①把图3中
的长方形进行剪裁,并拼成一个大正方形.在图3中画出裁剪线,并在图4的正方形网(虚线表示)格中画出拼成的大正方形(实线表示),该正方形的边长
______.(注:小正方形边长都为1,拼接不重叠也无空隙)
②在①的基础上,参照图2的画法,在数轴上用点M表示数a.
(2)请你参照上面的方法
①把图3中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab86a0122f70522cedf316595d303179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
②在①的基础上,参照图2的画法,在数轴上用点M表示数a.
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【推荐2】如图,△ACB和△ECD都是等腰直角三角形,CA=CB,CE=CD,△ACB的顶点A在△ECD的斜边DE上,连接DB.
![](https://img.xkw.com/dksih/QBM/2022/3/19/2939558678634496/2942362702741504/STEM/9b2b5e43-8024-40bf-a90e-5c9078259181.png?resizew=169)
(1)证明:△ECA≌△DCB
(2)若
,
,求AC的长.
![](https://img.xkw.com/dksih/QBM/2022/3/19/2939558678634496/2942362702741504/STEM/9b2b5e43-8024-40bf-a90e-5c9078259181.png?resizew=169)
(1)证明:△ECA≌△DCB
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
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【推荐1】已知:如图,
是
的角平分线,点E、F分别在
上,且
,
.
![](https://img.xkw.com/dksih/QBM/2023/4/7/3211495308484608/3212231118503936/STEM/d5eee9ef363d452ebea7d42b230791ee.png?resizew=184)
(1)求证:
;
(2)若
的周长为3,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://img.xkw.com/dksih/QBM/2023/4/7/3211495308484608/3212231118503936/STEM/d5eee9ef363d452ebea7d42b230791ee.png?resizew=184)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699d8346239a5558cc53911f181a270c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】如图,B、F、C、E是直线l上的四点,
.
![](https://img.xkw.com/dksih/QBM/2021/7/3/2756432937345024/2756441517400064/STEM/1e7ddaec-29c2-46da-8a89-79c3ba88619d.png)
(1)求证:
;
(2)将
沿直线l翻折得到
.
①用直尺和圆规在图中作出
(保留作图痕迹,不要求写作法);
②连接
,则直线
与l的位置关系是__________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce7ebad42a20875c2aeedabcc158152.png)
![](https://img.xkw.com/dksih/QBM/2021/7/3/2756432937345024/2756441517400064/STEM/1e7ddaec-29c2-46da-8a89-79c3ba88619d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ca10806fc8c3c3efd6859f526b76900.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2df93bd15f25096c510b589aad0dfc1.png)
①用直尺和圆规在图中作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2df93bd15f25096c510b589aad0dfc1.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
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【推荐1】如图,在▱ABCD中,AE⊥BC,AF⊥CD,垂足分别为E,F,且BE=DF
(1)求证:▱ABCD是菱形;
(2)若AB=5,AC=6,求▱ABCD的面积.
(1)求证:▱ABCD是菱形;
(2)若AB=5,AC=6,求▱ABCD的面积.
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解答题-证明题
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【推荐2】如图,在矩形
中,点
在边
上,将
沿
折叠,点
落在
边上的点
处,过点
作
交
于点
,连接
.
![](https://img.xkw.com/dksih/QBM/2020/10/11/2568287362801664/2569884052013056/STEM/d97e9b01-e3cc-4c38-a336-c460f4f413f4.png)
(1)求证:判断四边形
是什么特殊四边形,并证明你的结论;
(2)若
,
,求四边形
的面积.
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7c7aa7af2be894c493aa263e50068f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://img.xkw.com/dksih/QBM/2020/10/11/2568287362801664/2569884052013056/STEM/d97e9b01-e3cc-4c38-a336-c460f4f413f4.png)
(1)求证:判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
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