如图,
和
是以点
为直角顶点的等腰直角三角形,把
以
为中心顺时针旋转,点
为射线
、
的交点.若
,
.
与
的数量关系是_____;位置关系是_____.
(2)如图2,当点
在
的延长线上时,求
的长;
(3)在旋转过程中,当线段
时,求
的长.(请自己作图解决)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
(3)在旋转过程中,当线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5611470e86c8d1788987e925b7ce2a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
23-24九年级上·贵州铜仁·阶段练习 查看更多[2]
贵州省铜仁市沿河土家族自治县初中第一集团2023-2024学年九年级上学期第二次统考数学试题(已下线)专题05 三角形中的证明与计算问题-2024年中考数学二轮热点题型归纳与变式演练(江苏专用)
更新时间:2024-03-13 15:52:49
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【推荐1】在10×10网格中,点A和直线l的位置如图所示:
(1)将点A向右平移6个单位,再向上平移2个单位长度得到点B,在网格中标出点B;
(2)在(1)的条件下,在直线l上确定一点P,使PA+PB的值最小,保留画图痕迹,并直接写出PA+PB的最小值:______;
(3)结合(2)的画图过程并思考,直接写出
+
的最小值:____
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/10/e4b806cd-0ee3-4138-8aff-e0ea1bdea95d.png?resizew=200)
(1)将点A向右平移6个单位,再向上平移2个单位长度得到点B,在网格中标出点B;
(2)在(1)的条件下,在直线l上确定一点P,使PA+PB的值最小,保留画图痕迹,并直接写出PA+PB的最小值:______;
(3)结合(2)的画图过程并思考,直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2ff3b78e3b3c1b6c0602d3e1c047b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e23ba3484945e6fbd7e3c51f84e3ae.png)
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【推荐2】如图1,在矩形
中,
,E为边
上的动点,将矩形
沿直线
折叠,点A,B的对应点分别为点
.
时,则
;
(2)连接
,当
为直角三角形时,求
的长;
(3)设
与
的交点为点F,连接
,如图2,当四边形
为矩形时,求矩形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d9911b76a2fe3477aad7682ea114db1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1320d3b30daf11c5a7419983da3b3776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b795dd22b08ffb5567bff9892d78de23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34dbf33492e5223df78dea34a24ae015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020ebe1219437129358b986eb9e70bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104fd0c1e8417ae5689d3c64910f4893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104fd0c1e8417ae5689d3c64910f4893.png)
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真题
解题方法
【推荐1】如图1,边长为4的正方形ABCD中,点E在AB边上(不与点A,B重合),点F在BC边上(不与点B,C重合).
第一次操作:将线段EF绕点F顺时针旋转,当点E落在正方形上时,记为点G;
第二次操作:将线段FG绕点G顺时针旋转,当点F落在正方形上时,记为点H;
依次操作下去…
(1)图2中的△EFD是经过两次操作后得到的,其形状为 ,求此时线段EF的长;
(2)若经过三次操作可得到四边形EFGH.
①请判断四边形EFGH的形状为 ,此时AE与BF的数量关系是 ;
②以①中的结论为前提,设AE的长为x,四边形EFGH的面积为y,求y与x的函数关系式及面积y的取值范围;
(3)若经过多次操作可得到首尾顺次相接的多边形,其最大边数是多少?它可能是正多边形吗?如果是,请直接写出其边长;如果不是,请说明理由.
第一次操作:将线段EF绕点F顺时针旋转,当点E落在正方形上时,记为点G;
第二次操作:将线段FG绕点G顺时针旋转,当点F落在正方形上时,记为点H;
依次操作下去…
(1)图2中的△EFD是经过两次操作后得到的,其形状为 ,求此时线段EF的长;
(2)若经过三次操作可得到四边形EFGH.
①请判断四边形EFGH的形状为 ,此时AE与BF的数量关系是 ;
②以①中的结论为前提,设AE的长为x,四边形EFGH的面积为y,求y与x的函数关系式及面积y的取值范围;
(3)若经过多次操作可得到首尾顺次相接的多边形,其最大边数是多少?它可能是正多边形吗?如果是,请直接写出其边长;如果不是,请说明理由.
![](https://img.xkw.com/dksih/QBM/2014/7/30/1573742155628544/1573742161715200/STEM/9291867e132945ad8530a0f778d05172.png)
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名校
【推荐2】在矩形ABCD中,点P是射线BC上一动点,点B关于直线AP的对称点为E,直线PE与直线CD交于点F.
![](https://img.xkw.com/dksih/QBM/2022/2/23/2922438991724544/2923895177887744/STEM/194a673d-4fd1-40af-8d71-464af81c030c.png?resizew=130)
(1)如图1,当A,C,E共线时,若
,判断△ACF的形状,并证明;
(2)若当点P在线段BC上的某个位置时(不与B,C重合),有
,求证:当点P在BC延长线上任意位置时,都有
.
![](https://img.xkw.com/dksih/QBM/2022/2/23/2922438991724544/2923895177887744/STEM/194a673d-4fd1-40af-8d71-464af81c030c.png?resizew=130)
(1)如图1,当A,C,E共线时,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392b9e1a179a6676362679354a9e7e51.png)
(2)若当点P在线段BC上的某个位置时(不与B,C重合),有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed04f391889f1481ebaa308193ce0a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed04f391889f1481ebaa308193ce0a7.png)
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【推荐1】如图(1),已知△ABC是等腰直角三角形,∠BAC=90°,点D是BC的中点.作正方形DEFG,使点A、C分别在DG和DE上,连接AE、BG.
(1)试猜想线段BG和AE的关系(位置关系及数量关系),请直接写出你得到的结论;
(2)将正方形DEFG绕点D逆时针方向旋转一角度α后(0°<α<90°),如图(2),通过观察或测量等方法判断(1)中的结论是否仍然成立?如果成立,请予以证明;如果不成立,请说明理由;
(3)若BC=DE=2,正方形DEFG绕点D逆时针方向旋转角度α (0°<α<360°)过程中,当BG为最小值时,求AF的值.
(1)试猜想线段BG和AE的关系(位置关系及数量关系),请直接写出你得到的结论;
(2)将正方形DEFG绕点D逆时针方向旋转一角度α后(0°<α<90°),如图(2),通过观察或测量等方法判断(1)中的结论是否仍然成立?如果成立,请予以证明;如果不成立,请说明理由;
(3)若BC=DE=2,正方形DEFG绕点D逆时针方向旋转角度α (0°<α<360°)过程中,当BG为最小值时,求AF的值.
![](https://img.xkw.com/dksih/QBM/2019/4/24/2189229564616704/2191002334535680/STEM/af12c5dce779422daf3ee425271adb08.png?resizew=406)
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【推荐2】如图,在等边
中,点P为线段
上一动点(不与B,C重合),连接
,以点A为旋转中心,将线段
逆时针旋转α角,得到线段
.
(1)如图1,连接
,点M为线段
的中点.当点M在线段
上时,求证:
平分
;
(2)如图2,点D为线段
的中点,连接
,当
时.
①判断
与
的位置关系,并说明理由;
②连接
,若
,求
的最小值.
![](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/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
(1)如图1,连接
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7023ec0f513c7d0ef86859a5ede54.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/29bc90fc-916c-4940-975a-3d6a73fbe270.png?resizew=175)
(2)如图2,点D为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/6b1f04ab-a1bb-4836-a500-5837a9543749.png?resizew=175)
①判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04bd42d75c7b5cff8d206ee7e3c3cee1.png)
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【推荐1】如图,矩形
中,
.
是边
上一动点(不与点
重合),延长
到
,使
,
,
交于点
,连接
并延长交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/e0aabcd4-3d7f-4d1e-bd05-6ce7641f2f8d.png?resizew=326)
(1)若
,求证:
;
(2)探究:当点
运动时,点
的位置是否发生变化?请说明理由;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fc998d33cdf37c272f79cfd64b7b99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b694bf5ec20ec34ccbc12a74996c7eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/e0aabcd4-3d7f-4d1e-bd05-6ce7641f2f8d.png?resizew=326)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e2b5060e1311f27bcbde24dac84db8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5f38466213a8a2d11ac1ad791aa9d1b.png)
(2)探究:当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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【推荐2】如图,在矩形
中,
,
,
为
上一点,且
,动点
从点
出发沿射线
方向以每秒3个单位长度的速度运动.连接
,
,过点
作
的平行线交射线
于点
,设点
的运动时间为
秒(不考虑
,
,
在一条直线上的情况).
(1)当
时,求
的长;
(2)当
时,求证
;
(3)当
时,若
与
相似,求
的值;
(4)过点
作
,交
于点
,当
不小于
时,直接写出点
运动的时长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a306417e43670260e4b68a928a22071f.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/b7cbfaec1d9dcaaf159b060163436113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/ccd6ec84-67f4-49cc-be60-12c869c97cb0.png?resizew=323)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c581dab991aeadf06d972e47673ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6668637a7e299c81b5ecb7ea747856.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22857b6d571d49dd4e0f05dc45b5b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc5c12b241539cc99487865f7d8bf34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(4)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0fb03af3eb6b686788356cee344394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐3】类比探究题:
【建立模型】
如图1,等腰直角三角形
中,
,
,直线
经过点C,过A作
于点D,过B作
于点E.求证:
.
【应用模型】
如图2,点A的坐标为
,点B是x轴正半轴上的一动点,以
为直角边作等腰直角
,使
,设点B的横坐标为x,点C的纵坐标为y,请写出y与x的函数关系.
【拓展拔高】
如图3,矩形
中,
,
,点P是
边上的一个动点(点P与点B,C都不重合),现将
沿直线
折叠,使点C落到点F处;过点P作
的角平分线交
于点E.设
,
,求y与x的函数关系:y是否有最大值,若有,求出最大值;若没有,说明理由.
【建立模型】
如图1,等腰直角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323b786e35c9b762d00f2b2ef74ce1d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c388d0a3f0a8d9fb0b9576d00af225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5c60ab4cdefda079244161bb911a453.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83e4f28c096dffd7df54b1162f5b3ae.png)
【应用模型】
如图2,点A的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0efe3c42f37bcb7d6552fdf6261e50a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
【拓展拔高】
如图3,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c0c4e8cd3f3b7939d3010d76564fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a666403569e607f32af5f762c246dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e83115ca0edf2fedb181bb960f3efde.png)
您最近一年使用:0次