如图,等边△
内接于圆
中,已知
点坐标为(
,0),圆
交y轴正半轴于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/86d26ee5-ac73-4618-8995-e02f04668a2b.png?resizew=397)
(1)请直接写出点
、
的坐标;
(2)如图1,过点
作圆
的切线交y轴于点
,求图中阴影部分的面积;
(3)如图2,点
为
中点,连接
,
、
分别在线段
和y轴正半轴上,且满足
,连接
交
于点
,当△
为等腰三角形时,试求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9eeee83b4b7c6ceac7828ff534ce15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/671b087abb1d2692c8be5b16846c4690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f411a59b236e1e7feeae064ef31cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9eeee83b4b7c6ceac7828ff534ce15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/86d26ee5-ac73-4618-8995-e02f04668a2b.png?resizew=397)
(1)请直接写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
(2)如图1,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/671b087abb1d2692c8be5b16846c4690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9eeee83b4b7c6ceac7828ff534ce15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289d7a880379d6060065c829b45b0ed6.png)
(3)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60dc9f8e47e78b7f4ab2dd9cd559f601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eacd9c1ce5e65fec29c32f40d86b73d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fdf79f40252d51be11d08a0b9b44b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a28be4d5a16cf245f6fa7c4088fee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dd71a8cbe8d1da754b8b4ed18bb0048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eacd9c1ce5e65fec29c32f40d86b73d.png)
更新时间:2022-10-07 23:09:23
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【推荐1】如图,A、P、B、C是⊙O上的四个点,∠APC=∠CPB=60°,BC=2
,求⊙O的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/19/4549b26b-7040-4667-8560-9eacc22b2d21.png?resizew=179)
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【推荐2】如图,已知M在x轴上,
与x轴交于A,D两点,与y轴正半轴交于B,点C是
上一点,且
,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/e7f74e43-2e99-4f3c-87b4-a053c7ff467e.png?resizew=361)
(1)圆心M坐标为 ;(直接写出)
(2)求
的正切值;
(3)过点C作弦
,交
于点E,当
,则
长= (直接写出).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e71fe51a7330c9483fd6d630eda4e97.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/e7f74e43-2e99-4f3c-87b4-a053c7ff467e.png?resizew=361)
(1)圆心M坐标为 ;(直接写出)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95efaa2bb4dce0f63f4a23e0f29c5aa0.png)
(3)过点C作弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226c231c1150e27c34eb787a46b02ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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【推荐1】如图1,点
在射线
上,且
,过点
在射线
上方作射线
,且
,点
从点
出发,沿
方向以每秒2个单位长度的速度运动,同时点
从点
出发,沿
方向以每秒1个单位长度的速度运动,当点
到达点
时,点
,
都停止运动.以点
为圆心,
为半径的半圆与射线
交于点
,与射线
交于点
,连接
,
,设运动时间为
秒(
).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/ec67cb0b-157a-4c73-b2bc-fde4dec9b8bb.png?resizew=689)
(1)用含
的式子表示
的长为___________;当点
与点
重合时,
的长为___________;
(2)若
与半圆
相切,求
的长;
(3)如图2,当
时,
与半圆
的另一个交点为
,连接
,求
的度数及
的长;
(4)若半圆
与线段
只有一个公共点,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ea2ed91a9d38a44ff9422648dfed4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347af52a90d3b53c388300041ba508b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/ec67cb0b-157a-4c73-b2bc-fde4dec9b8bb.png?resizew=689)
(1)用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
(3)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ada7c406cac4bb96ce95ae134c207b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea2f6098be91fa704dc562b62471362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5e4a420fdda2872433342098ee04c6.png)
(4)若半圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
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【推荐2】如图,在
中,点
在
上,且
,
过点
且与
相切于点
,与
相交于点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/b6eb4fb2-fb45-48e3-9081-48b01fc78c0e.png?resizew=207)
(1)求
的度数.
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f9cb93947d668d2e054348103f8bf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/774c563aec0a5ee248700963fe3e3977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/b6eb4fb2-fb45-48e3-9081-48b01fc78c0e.png?resizew=207)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a55a1a244f81097e05e715b69580faa.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2221947a1e1b8312e60d4c4eaca8456c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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【推荐1】如图,在
中,
,
是边
上一点,以
为圆心,OA为半径的圆分别交AB,AC于点E,D,在
的延长线上取点
,使得
,
与
交于点
.
(1)判断直线
与
的位置关系,并说明理由;
(2)OA=4, ∠A=30°,求图中线段DG、线段EG与弧DE围成阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34ff9d4fdd0d176042505b7aac016852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf361ea6533d0d319a12ad236fa4cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82d6b83a5dc6b15f3d5feff1a2d73faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fcb360984721a5600d426949ccdb14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3abf3173133683369785897e67fa84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c27c90b1e43951aa70b0abe213fa985b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e10ca4d3a4eaf1e9f750dac8071fa824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82d6b83a5dc6b15f3d5feff1a2d73faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4553a3034f89da311519cd866a0a3cb.png)
(1)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e10ca4d3a4eaf1e9f750dac8071fa824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870fa9709a70b3d99118b4b671fb016f.png)
(2)OA=4, ∠A=30°,求图中线段DG、线段EG与弧DE围成阴影部分的面积.
![](https://img.xkw.com/dksih/QBM/2018/12/24/2103645940105216/2107351537049601/STEM/67e9dd5f49b14802bd38d92ab2f88c7a.png?resizew=172)
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名校
【推荐2】根据背景素材,探索解决问题
探究草坪喷灌系统的节水优化方案 | ||
项目 背景 | 小明和他的同学在操场上散步时,一不小心被草坪的喷灌系统的水喷到了,他们想,这个水是不是可以开小点?不仅不会喷到人,也节约水资源.但是,水开的小就不能保证整个草坪都喷到水……为了解决这个问题,他们展开了项目研究,查阅了大量文献资料,以及实地观察了学校的草坪喷灌系统的运作. | ![]() |
问题 解决 | 小明认为可以把此问题抽象为一个数学问题: 在边长为20米的正方形草坪上,如何设计喷头布局方案,使得节水效果最好? | |
任务一 | (1)同学甲和乙马上设计了两种方案,如图1所示,你认为哪位同学设计的方案更节水?(为了方便研究同时结合文献资料,同学们将喷头的喷水面抽象为圆或者扇形,统一了节水评价标准为:阴影部分面积越小,越节水.)( ) A.甲更节水 B.乙更节水 C.一样节水 D.无法比较 | ![]() |
任务二 | (2)小明认为他们的方案可以进一步优化,他设计了如图2所示的喷灌方案(以点D为圆心,![]() ![]() ![]() ![]() ![]() | ![]() |
任务三 | (3)在小明设计的方案基础上,丙同学又进行了优化,他的方案如图3所示,先以点B为圆心,AB长为半径作扇形,交BD于点E,再以点D为圆心,DE长为半径作扇形,此时正方形草坪还有两处未被喷水面覆盖,于是再分别以点A,C为圆心,AE长为半径作扇形,得到如图3的方案图,则![]() | ![]() |
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解题方法
【推荐1】当一个角固定不变,而某种图形在该角的内部变化,则我们称这个角为墙角.
(1)如图1,墙角
=30°,如果AB=3,长度不变,在角内滑动,当OA=6时,则求出此时OB的长度.
(2)如图2,墙角
=30°,如果在AB的右边作等边
,AB=3,长度不变,滑动过程中,请求出点O与点C的最大距离.
(3)如图3,墙角
=
时,如果点E是
一条边上的一个点,
=90°,其两条边与
另一条边交于点F与点D,求
的最大值.
(1)如图1,墙角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b97285f9b02878e22a071e97fdb3f8a8.png)
(2)如图2,墙角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b97285f9b02878e22a071e97fdb3f8a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
(3)如图3,墙角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2f7171cb913e5637c12d2c21492c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b97285f9b02878e22a071e97fdb3f8a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b0b11a80e8b107e55534d7fda9f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b97285f9b02878e22a071e97fdb3f8a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08efba2a6fa8e73499e38b8c51e34766.png)
![](https://img.xkw.com/dksih/QBM/2020/4/7/2436468284145664/2437305877053440/STEM/3e3162be-a741-4b0b-aff9-11a5b4a29b82.png)
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【推荐2】已知:如图,在矩形
中,
是对角线,
,
.点P从点A出发,沿
方向匀速运动,速度为
,同时,点Q从点B出发,沿
方向匀速运动,速度为
.过点P作
于点M,连接
,设运动时间为t(s)(0<t<4),解答下列问题:
(1)当t为何值时,点Q在线段
的中垂线上;
(2)写出四边形
的面积为S(
)与时间t的函数关系式;
(3)是否存在某一时刻t,使
?若存在,求出t的值;若不存在,请说明理由;
(4)当t为何值时,
与
相似.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee49e97546d466ba3ee630e08cdc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545764505bb00578a870c5e39493a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc2d9b900111188aca83126dff97f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc2d9b900111188aca83126dff97f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40b744f59a78172b82d3ea6a3216103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(1)当t为何值时,点Q在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)写出四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6b6b990538d6654ce4775f26b57b8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
(3)是否存在某一时刻t,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffa745793b7bfa7d0553f60a073459d.png)
(4)当t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://img.xkw.com/dksih/QBM/2018/4/20/1928099063095296/1928713486057472/STEM/3765ddf1471b4cb29b104985e1b1e105.png?resizew=365)
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【推荐3】在平面直角坐标系中,点A(m,n),C(n,0),且m、n满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041ee425b2be5de7198f4e8b9b98dd06.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/8b370203-283b-40a9-a2aa-3feb6ee83e08.png?resizew=495)
(1)求A、C两点坐标;
(2)若点P以每秒2个单位的速度从点C出发在射线CA上运动,点P的运动时间为t秒,过点P沿x轴正方向作射线PE,使PE
x轴,请直接写出∠APE、∠OAC、∠AOC的数量关系;
(3)在(2)的条件下,若AC = 5,在点P运动的同时,点Q从点O出发,以每秒1个单位的速度沿x轴负半轴运动,连接OP、AQ,是否存在某一时刻,使
,若存在,请求出t值,并写出Q点坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041ee425b2be5de7198f4e8b9b98dd06.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/8b370203-283b-40a9-a2aa-3feb6ee83e08.png?resizew=495)
(1)求A、C两点坐标;
(2)若点P以每秒2个单位的速度从点C出发在射线CA上运动,点P的运动时间为t秒,过点P沿x轴正方向作射线PE,使PE
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
(3)在(2)的条件下,若AC = 5,在点P运动的同时,点Q从点O出发,以每秒1个单位的速度沿x轴负半轴运动,连接OP、AQ,是否存在某一时刻,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faece352a3f22d1167092105e56a73c5.png)
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