如图,在平面直角坐标系中,直线
交
轴、
轴于
和
两点,其中
和
是方程
的两个实数根,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/6a9ac45a-f2bb-4267-bd3d-84c17dc9caa2.png?resizew=432)
(1)如图(1),求线段
的长;
(2)如图(2),点
为第三象限一点,射线
交
于点
,连接
交
轴负半轴于点
,
的垂直平分线交
轴负半轴于点
,连接
,设
的度数为
,请用含
的式子表示
的度数;
(3)如图(3),在(2)的条件下,连接
,当
,
时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3160fc73f2a90ae4a1a97351ab2673b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9199b50dd0036be9b764c621d1d46f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b60076ad90f01480cc1b28fc84b1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8845c0d06613fabb0358d5392cca38b3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/6a9ac45a-f2bb-4267-bd3d-84c17dc9caa2.png?resizew=432)
(1)如图(1),求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图(2),点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3081d405e3066e17402105ebd7d1335f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b79500f1d61e0c017166bd0df798ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c19410c7abeae002ca97cfad4c791f.png)
(3)如图(3),在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e775cbdf25d6611317212d0b96e3968f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7277733875645851ba19f488fc21415d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
更新时间:2024-01-10 22:04:50
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】已知:在
中,
,将
绕点C旋转使点B落在直线
上的点D处,点A落在点E处,直线
与直线
相交于点F,射线
与射线
相交于点P,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/a1a87723-57eb-470c-9acd-76af9df83e0d.png?resizew=166)
(1)如图,连接
,当
时,
求证:①四边形
是等腰梯形;
②
是
与
的比例中项.
(2)当点D与点A的距离为5时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](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/e6e490f703eb6c9bb1278c78ebc2d661.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/a1a87723-57eb-470c-9acd-76af9df83e0d.png?resizew=166)
(1)如图,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e58e106211fd9536a15a31762d3a32a.png)
求证:①四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc1cbcd6d00f0c36bad8254297d9f33.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
(2)当点D与点A的距离为5时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】如图,在平面直角坐标系
中,直线
与
轴、
轴分别交于点
、点
, 点
在
轴的负半轴上,若将
沿直线
折叠,点
恰好落在
轴正半轴上的点
处.
(1)求
的长;
(2)直接写出点
和点
的坐标,
_______;
(3)求直线
的函数解析式;若点
是直线
与直线
的交点,直接写出点
的坐标;
(4)在
轴上是否存在一点
,使得以
为顶点的三角形是等腰三角形,若存在,请直接写出点
的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa2cecb2688db80d0605e5706cf29ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a98e24892abc0eb34d5216d4e89c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4c625a55ef1d2920a0605d52c8da23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/12/bbc699f6-ff09-4b91-b85a-650ef0d378b9.png?resizew=169)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)直接写出点
![](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/c3adb9453a2cd3d5b821d55d8c4e151c.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(4)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ec6eaee7ab011f9f96d8adf4d31a00d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】平面直角坐标系中,O为原点,点
,点
,线段
的中点为点C.将
绕着点B逆时针旋转,点O对应点为
,点A的对应点为
.
![](https://img.xkw.com/dksih/QBM/2022/11/21/3114411949645824/3158855482802176/STEM/b8bcb189acbb4db98335a06258a7f650.png?resizew=454)
(1)如图,当点
恰好落在
上时,
①此时
的长为 ;
②点P是线段
上的动点,旋转后的对应点为
,连接
,
,试求
最小时点P的坐标.
(2)如图②,连接
,
,则在旋转过程中,
的面积是否存在最大值?若存在,直接写出最大值,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/610d3b6f22f1fbe153388e9e434d0622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/382b2d9410d5b92c108aa875f1d552a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://img.xkw.com/dksih/QBM/2022/11/21/3114411949645824/3158855482802176/STEM/b8bcb189acbb4db98335a06258a7f650.png?resizew=454)
(1)如图,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①此时
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c4c2157cf374ebe6352715ef100471.png)
②点P是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9460e8571262302490aca08902d67c4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32fb50c66cd2de786b39cb442ec54a16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6399a1f209f6b8351c25f6b57ddc26bc.png)
(2)如图②,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabe764f05300ac83c7d16b685d27af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c4c2157cf374ebe6352715ef100471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3335800211f89bb962bde3240df2c8.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图1,在平面直角坐标系中,点A(a,0)点B(b,0)为x轴上两点,点C在Y轴的正半轴上,且a,b满足等式a2+2ab+b2=0.
(1)判断△ABC的形状并说明理由;
(2)如图2,M,N是OC上的点,且∠CAM=∠MAN=∠NAB,延长BN交AC于P,连接PM,判断PM与AN的位置关系,并证明你的结论.
(3)如图3,若点D为线段BC上的动点(不与B,C重合),过点D作DE⊥AB于E,点G为线段DE上一点,且∠BGE=∠ACB,F为AD的中点,连接CF,FG.求证:CF⊥FG.
(1)判断△ABC的形状并说明理由;
(2)如图2,M,N是OC上的点,且∠CAM=∠MAN=∠NAB,延长BN交AC于P,连接PM,判断PM与AN的位置关系,并证明你的结论.
(3)如图3,若点D为线段BC上的动点(不与B,C重合),过点D作DE⊥AB于E,点G为线段DE上一点,且∠BGE=∠ACB,F为AD的中点,连接CF,FG.求证:CF⊥FG.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/225023f2-b0d6-4b78-b013-95793bd17b54.png?resizew=527)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,直线AB∥CD,直线l与直线AB,CD相交于点E,F,点P是射线EA上的一个动点(不包括端点E),将△EPF沿PF折叠,使顶点E落在点Q处.
①若∠PEF=48°,则∠EFC的度数为______.
②若∠PEF=48°,点Q恰好落在其中一条平行线上,则∠EFP的度数为______.
③若∠PEF=75°,∠CFQ=
∠PFC,则∠EFP的度数为______.
①若∠PEF=48°,则∠EFC的度数为______.
②若∠PEF=48°,点Q恰好落在其中一条平行线上,则∠EFP的度数为______.
③若∠PEF=75°,∠CFQ=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
![](https://img.xkw.com/dksih/QBM/2019/4/7/2177314829778944/2180232633131008/STEM/32403284e6fd4039ac2a9a456a2e94be.png?resizew=400)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
【推荐3】【了解概念】如图1,已知
,
为直线
同侧的两点,点
为直线
的一点,连接
,
,若
,则称点
为点
,
关于直线
的“等角点”.
(1)【理解运用】如图2,在
中,
为边
上一点,点
、点
关于直线
对称,连接
并延长至点
判断点
是否为点
,
关于直线
的“等角点”,并说明理由;
(2)【拓展提升】如图2,在(1)的条件,若
,
,点
是射线
上一点,且点
,
关于直线
的“等角点”为点
,请在图2中画出点
,判断
的形状,并说明理由;
(3)【拓展提升】如图3,在
中,
,
的平分线交于点
,点
到
的距离为2,直线
垂直平分边
,点
为点
,
关于直线
“等角点”,连接
,
,当
时,
的值为 .
![](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/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a47dcfe21804d58fcf67766ae5e4ec19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/8/dbbacb6a-36be-4932-96be-98689c4ba388.png?resizew=410)
(1)【理解运用】如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)【拓展提升】如图2,在(1)的条件,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92905d020164683947943040ec19c530.png)
(3)【拓展提升】如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b08c65c76a4e6adef51de4aa44dade95.png)
您最近一年使用:0次
解答题-应用题
|
较难
(0.4)
【推荐1】如图,一座石桥的主桥拱是四弧形,某时刻添得水面
的宽度为8米,拱高
(
的中点C到水面的距离)为2米.
(2)在主桥拱所在圆的圆心处有一水位检测仪,若过几天某时刻的水面为
,检测仪观测点
的仰角为
,求此时水面的宽度.(参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
(2)在主桥拱所在圆的圆心处有一水位检测仪,若过几天某时刻的水面为
![](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/33901ca3b2a8d7daa50fd5c80731a236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa9d0d7d42f0310a00b8912d1ecc182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b2e5340d1c891e1c691e5af21b04ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e03e88a83160589f51d40233ed4a23.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
解题方法
【推荐2】如图1,在正方形ABCD中,边长为2a,点E是AB边上的一个动点(点E与点A,B不重合),连接CE,过点B作BF⊥CE于点G,交AD于点F.
(1)求证:AF=BE;
(2)如图2,当点E运动到AB中点时,连接DG,求证:DG=2a;
(3)如图3,在(2)的条件下,过点C作CM⊥DG于点H,分别交AD,BF于点M,N,求
的值.
(1)求证:AF=BE;
(2)如图2,当点E运动到AB中点时,连接DG,求证:DG=2a;
(3)如图3,在(2)的条件下,过点C作CM⊥DG于点H,分别交AD,BF于点M,N,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7257b25ee15cdb509fb4a9e84113c843.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/788387a9-a8c9-434f-8682-eaeaeeba2e1b.png?resizew=441)
您最近一年使用:0次