综合与实践
问题情境:如图1,在矩形
中,
,
.将矩形
绕边
的中点E逆时针旋转角度
得到矩形
(点A,B,C,D的对应点分别是点
,
,
,
).
操作发现:
(1)连接
,
,
,
,则四边形
的形状是______;
问题探究:
(2)如图2,连接
,
,试判断
与
的数量关系,并说明理由;
拓展延伸:
(3)如图3,
与BC交于点F,连接BD,当点
落在线段BD上时.
①求
的长度;
②直接写出
的长度.
问题情境:如图1,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26ad70d2b3aac8604834d57dfc59bb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7199ded47c047792b3147c25467359c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d609847e2ff3d64e5a514582c3ead0e.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/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
操作发现:
(1)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b123ae31090740589ba27a846620b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b25f3ea33cc08b1e2a0d9c3a9dccaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c82997f2ec6eb7198914ef445f65160.png)
问题探究:
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
拓展延伸:
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
②直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71fe246270d1277f9eb2bf15af22e83.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/27/fa17aea5-fb07-4509-a675-e28463385124.jpg?resizew=480)
23-24九年级上·山西长治·期末 查看更多[2]
更新时间:2024-01-26 20:20:49
|
相似题推荐
解答题-证明题
|
困难
(0.15)
解题方法
【推荐1】如图,四边形ABCD中,∠B=90°,AD∥BC,AD=AC,AB=6,BC=8.点P以每秒5个单位长度由点A沿线段AC运动;同时,线段EF以相同的速度由CD出发沿DA方向平移,与AC交于点Q,连结PE,PF.当点F与点B重合时,停止所有运动,设P运动时间为t秒.
(1)求证:△APE≌△CFP.
(2)当t<1时,若△PEF为直角三角形,求t的值.
(3)作△PEF的外接圆⊙O.
①当⊙O只经过线段AC的一个端点时,求t的值.
②作点P关于EF的对称点P′,当P′落在CD上时,请直接写出线段CP′的长.
(1)求证:△APE≌△CFP.
(2)当t<1时,若△PEF为直角三角形,求t的值.
(3)作△PEF的外接圆⊙O.
①当⊙O只经过线段AC的一个端点时,求t的值.
②作点P关于EF的对称点P′,当P′落在CD上时,请直接写出线段CP′的长.
![](https://img.xkw.com/dksih/QBM/2020/4/20/2445805468983296/2446341429649408/STEM/1df3e8cc01f142d8ae6cd9d6644191b8.png?resizew=160)
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名校
【推荐2】如图,在等腰直角
和等腰直角
,
,M为
的中点,连接
,过B作
的延长线于点S.
;
(2)若
,
,
,则四边形
的面积为______.(直接写出结果)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4772603205bb0cff2f18381a0c828042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c132aca5eddb4beeb6758aefb3b851.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63a94e89a00e9f487949e3f54f9b368.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d48f8048175db45d6b6c1075f1fd8e45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/871e910b8e5783b7172e8d114d4c09aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b0b68a671bb4d5ff1d5c0cbcf86df55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af35acf00f1d49b07c0e1ea7ef516f88.png)
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【推荐1】如图1,在平面直角坐标系中,抛物线
与x轴交于点
(点
在点
的左侧),交
轴于点
,点
的坐标为
,点
为抛物线的顶点,对称轴与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/8248f13b-793c-4be2-8537-eb0ab4306829.png?resizew=381)
(1)填空:
,点
的坐标是 ;
(2)连接
,点
是线段
上一动点(点
不与端点
重合),过点
作
,交抛物线于点
(点
在对称轴的右侧),过点
作
轴,垂足为
,交
于点
,点
是线段
上一动点,当
的周长取得最大值时,求
的最小值;
(3)在(2)中,当
的周长取得最大值时,
取得最小值时,如图2,把点
向下平移
个单位得到点
,连接
,把
绕点
顺时针旋转一定的角度![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
,得到
,其中边
交坐标轴于点
.在旋转过程中,是否存在一点
,使得
?若存在,请直接写出所有满足条件的点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e71461c5134339b5b54a80e588640f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c72229b08c676c08a3c7258895375f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25fa66b39472cb2192a1770019805d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/8248f13b-793c-4be2-8537-eb0ab4306829.png?resizew=381)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/763d6e1622794ce61102576a1c8d0f1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee50a23604ea2a9c1f3649dab97c2e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150cbaad560246d84e6411c69dfb6718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a33181b27b10690b4913595f8c1f46e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d830ff97422da8d6d4911ef6f22af4.png)
(3)在(2)中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a33181b27b10690b4913595f8c1f46e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d830ff97422da8d6d4911ef6f22af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831c4fbec375b0bfc8258ed9b1a81ef8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aac2537095c77fcd6b8a0f90dd311a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3257b6678b371eeacc45562d5e75edfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8011cd245d27f52b7a4b41c975f74934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0930c7eee26d2b5eb801ff641f4273c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
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困难
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【推荐2】探索新知:
如图1,射线
在
的内部,图中共有3个角:
,
和
,若其中有一个角的度数是另一个角度数的两倍,则称射线
是
的“巧分线”.
(1)一个角的平分线______这个角的“巧分线”;(填“是”或“不是”)
(2)如图2,若
,且射线
是
的“巧分线”,则
______;
深入研究:
如图2,若
,且射线
绕点P从
位置开始,以每秒
的速度逆时针旋转,当
与
成
时停止旋转,旋转的时间为t秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/307c69c3-c1b4-4a32-b37e-f46735b82dfa.png?resizew=365)
(3)当t为何值时,射线
是
的“巧分线”;
(4)若射线
同时绕点P以每秒
的速度逆时针旋转,并与
同时停止,请直接写出当射线
是
的“巧分线”时t的值.
如图1,射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
(1)一个角的平分线______这个角的“巧分线”;(填“是”或“不是”)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add60595ecea5d00ff1fbb2a5409be73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f9bd176ba109b64d458b415caad13d8.png)
深入研究:
如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add60595ecea5d00ff1fbb2a5409be73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb0aa8a61380228e285f3b5c7b74c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/307c69c3-c1b4-4a32-b37e-f46735b82dfa.png?resizew=365)
(3)当t为何值时,射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958e7abd79a73e20a4629233d7b42e4a.png)
(4)若射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741a44528782580d24249e8075b8cd9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
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【推荐3】【问题提出】
如图1,在正方形
中,点E,F分别在
边上,且
,连接
.探究线段
之间的数量关系.
【方法感悟】
(1)小明组同学利用构造全等三角形的方法探究三条线段的关系:如图2,延长
到点G,使
,连接
,先证明
,再证明
,从而得到正确结论.小明组同学的结论是___________;
小亮组同学对小明组构造全等三角形的环节提出了不同的看法,借助旋转三角形的方式探究问题:将
绕点A顺时针旋转90°得到
,再证明
,从而得到与小明组相同的结论.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/4194d793-1550-4e2e-aa10-0f8a33d87114.png?resizew=302)
【方法迁移】
(2)如图3,在
中,
,沿边
翻折得到
,点B的对应点为点D,点E,F分别在
边上,且
.试猜想线段
之间的数量关系,并证明你的猜想.
【问题拓展】
(3)如图4,在四边形ABCD中,
,点E,F分别在
边上,且
,试猜想当
与
满足什么关系时,可使得
.请直接写出你的猜想.
(4)如图5,在四边形
中,
,
,
与
为对角线,
.若
,
,求
的长.
如图1,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ced9844fe2e052c70486af0740afa63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180942edc839b9fda741b055df87216b.png)
【方法感悟】
(1)小明组同学利用构造全等三角形的方法探究三条线段的关系:如图2,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b555a0bb6b5132ecfb9cae3769912c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828d0ee008783093cbe6de3f5147bcb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7d143a1d6ba708f17021e41efd7d9a.png)
小亮组同学对小明组构造全等三角形的环节提出了不同的看法,借助旋转三角形的方式探究问题:将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc727c642cbc2181476b7dd8eca471e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7d143a1d6ba708f17021e41efd7d9a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/4194d793-1550-4e2e-aa10-0f8a33d87114.png?resizew=302)
【方法迁移】
(2)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ced9844fe2e052c70486af0740afa63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a6aef04eceb608a7a2cfc3e566f9e8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180942edc839b9fda741b055df87216b.png)
【问题拓展】
(3)如图4,在四边形ABCD中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ced9844fe2e052c70486af0740afa63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a6aef04eceb608a7a2cfc3e566f9e8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a99627df7b1a88b9bf3dda20390d245.png)
(4)如图5,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7305de9211785b826823153897b17517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669f7a1e43ef893ef3a45fc47992947f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2915ea6f8ea0cb67a6b135ff275b4e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/7872072e-8e14-41b4-88ca-a0923e1c29d7.png?resizew=459)
您最近一年使用:0次
解答题-证明题
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困难
(0.15)
名校
【推荐1】已知
内接于
,
是弧
上一点,连接
交
于点
,
.
(1)如图1,求证:
平分
;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/18886077-c88f-4055-9111-649aec6ab638.png?resizew=155)
(2)如图2,连接
,交
于点
,求证:
;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/1c1cc8e6-1663-47ea-8eba-2ba362fbe455.png?resizew=151)
(3)如图3,在(2)的条件下,
是
的直径,
,过点
作
于
,交
于点
,延长
交
于点
,射线
交
于点
,连接
交
于点
,若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8329093b835a6f363da42d16b58ad4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27fbd6a8f96d74d79cd8e409bbc59c79.png)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/18886077-c88f-4055-9111-649aec6ab638.png?resizew=155)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef1451ec0ce795ecace47349fbb6f5d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/1c1cc8e6-1663-47ea-8eba-2ba362fbe455.png?resizew=151)
(3)如图3,在(2)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf94ad82f5a580c6ee9dfcd3bdc71a33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc87b0905616b1b9e849610876e25db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c56ffc1f3244957d01e53013868fa76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1bd75fbe8bec72e27a3b3b6d48f138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c56ffc1f3244957d01e53013868fa76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbd9c7e676ef19780ba2d1fc6d25930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/25c53ffe-d343-45df-9a88-f70b2e06a8a2.png?resizew=176)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】如图:在平面直角坐标系中,直线AB与x轴、y轴分别交于B、A两点,若OA、OB的长分别是方程若
的两根且OB>OA,AB=10,AC平分∠BAO交x轴于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/54a4d0e6-98dd-49b3-8da0-858e7354e95d.png?resizew=216)
(1)求A、B两点的坐标;
(2)直线AC的解析式;
(3)直线AC上是否存在点P,使A、B、P三点构成的三角形为直角三角形?若存在,请直接写出P点坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868d7514cbbc34a45e330e7b255b6b48.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/54a4d0e6-98dd-49b3-8da0-858e7354e95d.png?resizew=216)
(1)求A、B两点的坐标;
(2)直线AC的解析式;
(3)直线AC上是否存在点P,使A、B、P三点构成的三角形为直角三角形?若存在,请直接写出P点坐标;若不存在,请说明理由.
您最近一年使用:0次
解答题-问答题
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困难
(0.15)
【推荐1】【问题发现】
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/10e63132-19ee-4a2e-8c3d-7440feb07b55.png?resizew=439)
(1)如图1所示,
中,
,
,点D为
边上一点,且
,过点D作
,交BC边于点E,
的数量关系为__________,直线
所夹锐角为:____________;
【知识迁移】
(2)如图2所示,将(1)中的
绕点C顺时针旋转,连接
,两线交于点P,请问(1)中的结论还成立吗?请说明你的理由;
【经验升华】
(3)如图3所示,
,
,其他条件同(1),在
绕点C的旋转过程中,请直接写出
三点共线时AE的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/10e63132-19ee-4a2e-8c3d-7440feb07b55.png?resizew=439)
(1)如图1所示,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c284ccb6f4ee7a8690013d2ce16e226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3f157aab917082b835f4213ed81a3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/066cd386723885c535ea720f5817847a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b0a3fa475b24f57ecd79c681259561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b0a3fa475b24f57ecd79c681259561.png)
【知识迁移】
(2)如图2所示,将(1)中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b0a3fa475b24f57ecd79c681259561.png)
【经验升华】
(3)如图3所示,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa15de8ed6842d6fd51176b51f4844da.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
解题方法
【推荐2】如图,将
的边
绕点
逆时针旋转得到线段
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/4d17c6e1-d02c-40cc-a63d-d2660fe89139.png?resizew=558)
(1)如图1,连接
,若
,
,
,
,求
的长;
(2)如图2, 点
在
上, 且满足
,连接
,点
为
上一点,连接
交
于点
,若
,
, 求证
;
(3)如图 3, 若
,
,
,点
在直线
上且满足
, 将
沿虚线
折叠使得点
的对应点
落在
上,连接
与折痕
交于点
,请直接写出
最小时,点
到
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/4d17c6e1-d02c-40cc-a63d-d2660fe89139.png?resizew=558)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ff58e0fc7269d3c2fd1b0f80b9cce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7bf90782fcc4f95cfc58b154996daa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e00668f797c9ce25d0f07e8f4f33a4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如图2, 点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5adc18ca424552b35ab939e9d57943e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f0816423dff0c19d5723b62df2a2e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb83ce2a14c9ab7e16d3a8db97a28573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68382641b5e0cbaf624f70126d90ca06.png)
(3)如图 3, 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/068282a29ef83d938714e8d19b963a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a99e1ad0d6fb0f13be56d09086366c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次