问题提出:如图(1),
是菱形
边
上一点,
是等腰三角形,
,
,
交
于点
,探究
与
的数量关系.问题探究:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/45b502f3-88fa-4e43-8515-9904393f6c42.png?resizew=469)
(1)先将问题特殊化,如图(2),当
时,直接写出
的大小;
(2)再探究一般情形,如图(1),求
与
的数量关系;
(3)问题拓展 将图(1)特殊化,如图(3),当
时,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3767efa8adfb71001ad39df9560cbf6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a47d55a6a02549a48490bffdcb7a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2edcf11b341e3a4e2fdddb53648b36b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/45b502f3-88fa-4e43-8515-9904393f6c42.png?resizew=469)
(1)先将问题特殊化,如图(2),当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2edcf11b341e3a4e2fdddb53648b36b4.png)
(2)再探究一般情形,如图(1),求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2edcf11b341e3a4e2fdddb53648b36b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)问题拓展 将图(1)特殊化,如图(3),当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d03f73bec20b60bc7608972607f5a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1b167d03ae72f6662061558758953f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f1e72cbc30ad5fca807664692ea30b.png)
更新时间:2024-04-07 15:37:45
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】等腰
中,
,点
、点
分别是
轴、
轴上的两个动点,直角边
交
轴于点
,斜边
交
轴于点
.
(1)如图1,若
,求
点的坐标.
![](https://img.xkw.com/dksih/QBM/2020/11/20/2602164863680512/2606794470932480/STEM/be1e77d238fe43d585de64a58aa3ba1c.png?resizew=154)
(2)如图2,当等腰
运动到使点
恰为
中点时,连接
,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/219f924009cfc8683114b993b1615395.png)
![](https://img.xkw.com/dksih/QBM/2020/11/20/2602164863680512/2606794470932480/STEM/fbaacd0c6c124c6fb3c98cce44cbb2ab.png?resizew=152)
(3)如图3,
为
轴上一点,连接
以
为直角边向右作等腰
,其中
、连接
,若
,求五边形
的面积·
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178a27068cf5517ad64f211af10256ec.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921de6d905d036ee6f0babea7c8f9560.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2020/11/20/2602164863680512/2606794470932480/STEM/be1e77d238fe43d585de64a58aa3ba1c.png?resizew=154)
(2)如图2,当等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/219f924009cfc8683114b993b1615395.png)
![](https://img.xkw.com/dksih/QBM/2020/11/20/2602164863680512/2606794470932480/STEM/fbaacd0c6c124c6fb3c98cce44cbb2ab.png?resizew=152)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afe37d3668000dc88273838374e5b824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25be6617d61a7cb5a88b0d680b252b10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279563c3c055777ce1aa369a2ef54aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ceb015d5e3559cf300378e62025e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e25a5f19c2bfa577398591d8ade9fec1.png)
![](https://img.xkw.com/dksih/QBM/2020/11/20/2602164863680512/2606794470932480/STEM/baadd0c1c73b451da43a06ffcd105092.png?resizew=137)
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解答题-证明题
|
较难
(0.4)
【推荐2】已知:如图所示,锐角
中,BE、CF是高,在BE的延长线上截取
,在CF上截取
,再分别过点P作
于M点,过点Q作
于N点
![](https://img.xkw.com/dksih/QBM/2019/11/19/2337187098722304/2337918312931328/STEM/61cf04f4b7a64240b8acb8a2b8cdaa15.png?resizew=226)
(1)求证:
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1474d628c5d3c62fcc52f46151bd5eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e47b3e18d980f784ce64c48cbc21763d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31a470095e295c734a2f368cc6baf1b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4a18b737e0218f4d4a5cdf0957773ef.png)
![](https://img.xkw.com/dksih/QBM/2019/11/19/2337187098722304/2337918312931328/STEM/61cf04f4b7a64240b8acb8a2b8cdaa15.png?resizew=226)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e60bc1c6e660599440e321f901597c2.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ced091f3c074a476781ac451e37cfc.png)
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解答题-作图题
|
较难
(0.4)
解题方法
【推荐1】综合与实践
问题情境:
矩形ABCD中,AB=2,∠ADB=30°,将△BCD沿着对角线BD所在的直线平移,得到△B′C′D′,连接AB′,DC′.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/8e42733a-f530-42f7-8cd7-3a1e5a2cc90b.png?resizew=670)
操作探究:
(1)如图1,当△BCD沿射线BD的方向平移时,请判断AB′与DC′的长度有何关系?并说明理由;
(2)如图2,当△BCD沿射线DB的方向平移时,四边形AB′C′D能成为菱形吗?若能,求出平移的距离;若不能,说明理由;
(3)当△BCD平移距离为2时,请你在备用图中画出平移后的图形(除图2),并提出一个问题,直接写出结论.
问题情境:
矩形ABCD中,AB=2,∠ADB=30°,将△BCD沿着对角线BD所在的直线平移,得到△B′C′D′,连接AB′,DC′.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/8e42733a-f530-42f7-8cd7-3a1e5a2cc90b.png?resizew=670)
操作探究:
(1)如图1,当△BCD沿射线BD的方向平移时,请判断AB′与DC′的长度有何关系?并说明理由;
(2)如图2,当△BCD沿射线DB的方向平移时,四边形AB′C′D能成为菱形吗?若能,求出平移的距离;若不能,说明理由;
(3)当△BCD平移距离为2时,请你在备用图中画出平移后的图形(除图2),并提出一个问题,直接写出结论.
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名校
【推荐2】已知;如图1,菱形ABCD的边AB在x轴上,点B的坐标为
,点C在y轴上,
.
(1)求点A的坐标;
(2)如图2,连接AC,点P为△ACD内一点,BP与AC交于点G,
,点E、F分别在线段AP、BP上,且
.若
,求
的值;
(3)如图3,在(2)的条件下,当
时,试判断△PAF形状并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f2f1039054052ef23a22a68250462e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028eaeb9757d156aab61881cc1c7e343.png)
![](https://img.xkw.com/dksih/QBM/2019/12/17/2357122631630848/2358429859577856/STEM/4c37bdccd15e4e38a75c5ec95b112701.png?resizew=554)
(1)求点A的坐标;
(2)如图2,连接AC,点P为△ACD内一点,BP与AC交于点G,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b15b82151bff7cc0238d2034a6129f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6074d5ef82ea7bf0bc0b34891df47147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/594bc35dbb72ec279107fb861a9a3c86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31bf929a1b77096d9daaec5ff593ca64.png)
(3)如图3,在(2)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858bde3ec0ed63e00b7f1e79d2917bc7.png)
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解答题-问答题
|
较难
(0.4)
【推荐1】如图,已知在
中弦
、
都不是直径它们的夹角
,过
作
的垂线
交
于
,直线
,
交于点
,直线
,
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/37492c30-cec7-4782-afa2-4100e68e6d98.png?resizew=145)
(1)求证:
;
(2)若
,
,用含
的式子表示
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73152c2b4298298c8b81dc16dc21f5e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/37492c30-cec7-4782-afa2-4100e68e6d98.png?resizew=145)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708f18bf26949797ad5c3d23c0783317.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf73020a8c5f28195698cefb48c09686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b6269558518a9e0446c9f0f4c6d2bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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解答题-证明题
|
较难
(0.4)
【推荐2】如图,点E是正方形ABCD的边BC延长线上一点,连接DE,过顶点B作BF⊥DE,垂足为F,BF分别交AC于H,交CD于G.
(1)求证:BG=DE;
(2)若点G为CD的中点,求
的值;
(3)在(2)的条件下,求
的值.
(1)求证:BG=DE;
(2)若点G为CD的中点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d91db4100312737d863dbedc581c7e3.png)
(3)在(2)的条件下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3da9c154c562bdcc6263fe3e07ffc1.png)
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解答题-证明题
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较难
(0.4)
名校
【推荐1】如图,在
中,点D、E分别是边
、
上的点,且
.
![](https://img.xkw.com/dksih/QBM/2022/6/5/2999897796952064/3125102453243904/STEM/79b96147c32243efb53de0ae593754f8.png?resizew=398)
(1)如图1,若
,求证:
;
(2)若
.
①如图2,当
时,求
的长;
②如图3,当
时,直接写出
的长是______.
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/102e836344156ea835d7d4e9b4120fe8.png)
![](https://img.xkw.com/dksih/QBM/2022/6/5/2999897796952064/3125102453243904/STEM/79b96147c32243efb53de0ae593754f8.png?resizew=398)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13adb38ccafca858b49e6d3f71373382.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9089f9b75b205680e1f60839e7edc32.png)
①如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b34233772c4c26d6669499d9b1f15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
②如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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解答题-问答题
|
较难
(0.4)
【推荐2】如图,抛物线y=ax2+bx+c与x轴交于A(﹣2,0),B(6,0)两点,与y轴交于点C,直线l与抛物线交于A,D两点,与y轴交于点E,且点D为(4,3).
![](https://img.xkw.com/dksih/QBM/2022/4/4/2951030739156992/2962374065807360/STEM/1a805dc1ddd64b4a86eb84978f1472ad.png?resizew=151)
(1)求抛物线及直线l的函数关系式;
(2)点F为抛物线顶点,在抛物线的对称轴上是否存在点G,使
AFG为等腰三角形,若存在,求出点G的坐标;
(3)若点Q是y轴上一点,且∠ADQ=45°,请直接写出点Q的坐标.
![](https://img.xkw.com/dksih/QBM/2022/4/4/2951030739156992/2962374065807360/STEM/1a805dc1ddd64b4a86eb84978f1472ad.png?resizew=151)
(1)求抛物线及直线l的函数关系式;
(2)点F为抛物线顶点,在抛物线的对称轴上是否存在点G,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(3)若点Q是y轴上一点,且∠ADQ=45°,请直接写出点Q的坐标.
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