如图,在
中,
,
,
,动点P从A出发,沿射线
方向以每秒5个单位的速度运动,动点Q从C点出发,以相同的速度在线段
上由C向A运动,当Q点运动到A点时,P、Q两点同时停止运动.以
为边作正方形
(P、Q、E、F按逆时针排序),以
为边在
上方作正方形
.设点P运动时间为t.
的值.
(2)当
为等腰三角形时,求t的值;
(3)当t为何值时,正方形
的一个顶点
落在正方形
的边上,请直接写出t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348216467fda035329fe8fac46b39911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c06014afb43e306bf37c94a34b63e40.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/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3534df651f0a681bc905795b26833107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff2736998f1ae2c0ad52c5aa47e58c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a24a8f5e8fb89381f8add6549170345.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
(3)当t为何值时,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3534df651f0a681bc905795b26833107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff2736998f1ae2c0ad52c5aa47e58c3.png)
2024·河北石家庄·一模 查看更多[2]
更新时间:2024-04-16 18:48:54
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相似题推荐
解答题-问答题
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【推荐1】如图
,平面直角坐标系
中,抛物线
过点
,
和
,连接
,点
为抛物线上一动点,过点
作
轴交直线
于点
,交
轴于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/c9761f51-9a28-43ee-b2c0-80dcc8d12bdf.png?resizew=461)
(1)求抛物线和直线
的解析式;
(2)如图
,连接
,当
为等腰三角形时,求
的值;
(3)当
点在运动过程中,在
轴上是否存在点
,使得以
为顶点的三角形与以
为顶点的三角形相似(其中点
与点
相对应),若存在,直接写出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f605a7fc2f1064fe14882ee426839db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7720309624a5e413f5e612bd492effe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad341ad7ab934f47140bb6b46520f85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0522607eeb42a499c0f5b040bbdd42e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/c9761f51-9a28-43ee-b2c0-80dcc8d12bdf.png?resizew=461)
(1)求抛物线和直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699ccb1d8c438f5bc838cd3c55dacda0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2cd1a272dd483dc289292f31497c86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e20eeca70fb2583b2b7d600a8521e7dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】若四边形的一条对角线把四边形分成两个等腰三角形,则这条对角线叫做这个四边形的“巧分线”,这个四边形叫“巧妙四边形”,若一个四边形有两条巧分线,则称为“绝妙四边形”.
(1)下列四边形一定是巧妙四边形的是 ;(填序号点①平行四边形;②矩形;③菱形;④正方形.
初步应用
(2)在绝妙四边形ABCD中,AC垂直平分BD,若∠BAD=80°,则∠BCD= ;
深入研究
(3)如图,在梯形ABCD中,AD∥BC,AB=AD=CD,∠B=72°.求证:梯形ABCD是绝妙四边形.
(4)在巧妙四边形ABCD中,AB=AD=CD,∠A=90°,AC是四边形ABCD的巧分线,请直接写出∠BCD的度数.
(1)下列四边形一定是巧妙四边形的是 ;(填序号点①平行四边形;②矩形;③菱形;④正方形.
初步应用
(2)在绝妙四边形ABCD中,AC垂直平分BD,若∠BAD=80°,则∠BCD= ;
深入研究
(3)如图,在梯形ABCD中,AD∥BC,AB=AD=CD,∠B=72°.求证:梯形ABCD是绝妙四边形.
(4)在巧妙四边形ABCD中,AB=AD=CD,∠A=90°,AC是四边形ABCD的巧分线,请直接写出∠BCD的度数.
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【推荐1】如图1,△ABC中,∠BAC=90°,以AC为腰向下作△ACE,使得∠ACE=90°,AC=CE,G是AE上一点,且CG⊥BG,延长CA使得AF=AB,连接FG.
(1)求证:△BAG≌△FAG;
(2)如图2,延长FG与CE相交于点D,求证:G为DF中点;
(3)在(2)条件下,连接AD,若四边形ABCD是平行四边形,AB=1,求BC的长.
(1)求证:△BAG≌△FAG;
(2)如图2,延长FG与CE相交于点D,求证:G为DF中点;
(3)在(2)条件下,连接AD,若四边形ABCD是平行四边形,AB=1,求BC的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/15e39e7e-e14c-41c2-b767-1867e22c2b51.png?resizew=392)
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【推荐2】如图,在正方形
中,
在边
上(不与点
,
重合),
交对角线
于点
,
交
于点
,连接
.
(1)求证:
.
(2)若
,
,求
的长.
(3)如图,以
,
为邻边作矩形
,连接
,若正方形
的边长为9,
,求
的长.
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28bbdea60708bebc259452cc5e07ea5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/2/6b46feb5-622f-4ac6-b336-a952d9f5e32a.png?resizew=144)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7a9d52d371e73729589665ccd25bc82.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faffe3765c15f53305516895aa595a9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
(3)如图,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc99a90f1f60f28a37541a0f5a4dbbcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de77d666a7f3ae69d593e412009180af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/2/5f8f464d-a8d9-4e5d-a1c3-c52d3148326f.png?resizew=191)
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解题方法
【推荐1】如图,正方形
的边
在坐标轴上,点B的坐标为
.点P从点A出发,以每秒1个单位长度的速度沿x轴向点O运动;点Q从点O同时出发,以相同的速度沿x轴的正方向运动,规定点P到达点O时,点Q也停止运动.连接
,过P点作
的垂线,与过点Q平行于y轴的直线
相交于点D.
与y轴交于点E,连接
.设点P运动的时间为
.
的度数为______,点D的坐标为______(用t表示);
(2)求当
为何值时,
为等腰三角形?
(3)探索
周长是否随时间t的变化而变化?若变化,说明理由;若不变,试求这个定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b26075ea855e1504fe8d2e3aec383b1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e3fe42c58bceadb245c817270bdebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fb80b591b497d8d7a6d8592160de44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e98f2e85bdf9c6669c14f8966ed53be.png)
(2)求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf4b43b6792b9ae78a1c8cae4e60524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b6accdd9b317c922d335e44911df357.png)
(3)探索
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b98bec817e96fba365ba496ad3b9af.png)
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【推荐2】如图1,在正方形ABCD中,点O是对角线BD的中点.
![](https://img.xkw.com/dksih/QBM/2019/6/25/2233069836279808/2234097582383104/STEM/f4ac5d2a34824f78864ef74d23cd8944.png?resizew=428)
(1)观察猜想:将图1中的△BCD绕点O逆时针旋转至图2中△ECF的位置,连接AC,DE,则线段AC与DE的数量关系是 ,直线AC与DE的位置关系是 .
(2)类比探究:将图2中的△ECF绕点O逆时针旋转至图3的位置,(1)中的结论是否成立?并说明理由.
(3)拓展延伸:将图2中的△ECF在平面内旋转,设直线AC与DE的交点为M,若AB=4,请直接写出BM的最大值与最小值.
![](https://img.xkw.com/dksih/QBM/2019/6/25/2233069836279808/2234097582383104/STEM/f4ac5d2a34824f78864ef74d23cd8944.png?resizew=428)
(1)观察猜想:将图1中的△BCD绕点O逆时针旋转至图2中△ECF的位置,连接AC,DE,则线段AC与DE的数量关系是 ,直线AC与DE的位置关系是 .
(2)类比探究:将图2中的△ECF绕点O逆时针旋转至图3的位置,(1)中的结论是否成立?并说明理由.
(3)拓展延伸:将图2中的△ECF在平面内旋转,设直线AC与DE的交点为M,若AB=4,请直接写出BM的最大值与最小值.
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【推荐3】在平面直角坐标系
中,我们将横纵坐标都是整数的点叫作整点.以
为顶点向右上方作各边垂直于坐标轴的正方形,若对于直线
,此正方形内部(不包括边)有且仅有
个整点在直线
上,则称该正方形为直线
关于点
的“
类正方形”.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/5eb9d265-009a-43d5-a895-76ca2a1a7cb1.png?resizew=474)
(1)已知点
,
,
,
,则正方形
为直线
关于点
的_____类正方形;
(2)已知点
是整点且位于直线
上.设直线
关于点
的“3类正方形”的边长为
,求
的取值范围;
(3)已知点
,
位于直线
与
(
,
为常数)之间,点
,
分别位于直线
与
上.若存在以
,
,
,
为顶点的正方形,是某条直线关于点
的“3类正方形”,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/5eb9d265-009a-43d5-a895-76ca2a1a7cb1.png?resizew=474)
(1)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c9708ef0dc6d6f5dcf6596d3e4f6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6329198247b9c39bb31f0ce7e08f1f57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5f2bba8303c05689ef4538e98e8929.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e75ee9fb7c3b399a05daaf33a790377c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a351136b18bc7d3bd5122332772ab23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e212cdbfba6610bc55df2c1a737407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e212cdbfba6610bc55df2c1a737407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc638e61f77b03036e8de5c7c1aa42b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c4c8aec5a8b83f58c8bf97d6df55db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db8d3facff8f90f28a936fc5b3ab878.png)
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解答题-证明题
|
较难
(0.4)
【推荐1】如图,在⊙O的内接三角形ABC中,∠ACB=90°,AC=2BC,过C作AB的垂线l交⊙O于另一点D,垂足为E.设P是
上异于A,C的一个动点,射线AP交l于点F,连接PC与PD,PD交AB于点G.
(1)求证:△PAC∽△PDF;
(2)若AB=5,
,求PD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
(1)求证:△PAC∽△PDF;
(2)若AB=5,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f29f5072f34d88692734172b5fda22.png)
![](https://img.xkw.com/dksih/QBM/2019/6/19/2229160040439808/2231330879520768/STEM/915e2783172f45b4ba6b72bc10bb867b.png?resizew=209)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】综合与实践
问题情境:在
中,
.点
在
斜边
上运动,过点
作射线
,分别与边
交于点
.
猜想证明:
(1)当点
在
斜边
的中点处时,
①如图(1),在
旋转过程中,当点
时,
与
的数量关系是______,
_______.
②当
旋转到如图②所示的位置时,
的值是否发生变化?若不变,请证明;若变化,请说明理由.
③如图③,在
旋转过程中,当
时,直接写出线段
的长_______;
类比探究
(2)当点
在
斜边
上运动时,
①如图④,当点
运动到
时,
_______;
②如图⑤,连接
,当
是等腰三角形时,求
的长.
问题情境:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d0c819e913ae45d87a1898257e8e6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be6e0c4c7e268084a0523f54fbe9f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
猜想证明:
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/31/7a619122-13c8-426e-959b-894b7bf82975.png?resizew=698)
①如图(1),在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46060ff16376f584eb554e09686ab703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/824938c27f63ba9b36eaea6cdd389e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e064e7a02d1db4f5269e7a512c23baf.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46060ff16376f584eb554e09686ab703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fcc76f6c07ce7e0bc75653ea0351526.png)
③如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46060ff16376f584eb554e09686ab703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b38bbd93669765af69d7bb0049e2819b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
类比探究
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
①如图④,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5461da7d3ccd8ae644157361962a8693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e064e7a02d1db4f5269e7a512c23baf.png)
②如图⑤,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129f1d6567bef09b00b7f37894e6dba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次