如图,在
中,
,
,点
在边
上,
,
.点
是线段
上一动点,当半径为
的
与
的一边相切时,
的长为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.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/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c85409e4c685f7dbadae2de3cf9a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/2020/2/22/2404706522996736/2405355994169344/STEM/346a1d3b77824039b8b8b6a3eb71cea9.png?resizew=153)
更新时间:2020-02-23 19:32:12
|
相似题推荐
填空题
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较难
(0.4)
【推荐1】已知:点A、点B在直线
的两侧.
(点A到直线
的距离小于点B到直线
的距离).
![](https://img.xkw.com/dksih/QBM/2020/6/25/2492088262975488/2492274768183296/STEM/8c1ec31fc44e4b339413ee8f7aa7474f.png?resizew=174)
根据以上作图过程及所作图形,下列四个结论中:
①
是
的切线; ②
平分
;
③
; ④
.
所有正确结论的序号是___________________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(点A到直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/2020/6/25/2492088262975488/2492274768183296/STEM/8c1ec31fc44e4b339413ee8f7aa7474f.png?resizew=174)
如图, (1)作点B关于直线 ![]() (2)以点C为圆心, ![]() ![]() ![]() (3)过点A作 ![]() ![]() ![]() (4)连接 ![]() ![]() | ![]() |
根据以上作图过程及所作图形,下列四个结论中:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e124a392dc84fcc1662fe6d896aa12.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b8b78e43679799e77aafbd16f08f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b383ee53d165252de49f59c123ba6593.png)
所有正确结论的序号是
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【推荐2】在平面直角坐标系
中,
为
轴正半轴上一点.已知点
,
,
是
的外接圆.
(1)点
的横坐标为_______ ;
(2)若
最大时,则点
的坐标为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4129098ad406f5d89c02c3b1c4b905d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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【推荐1】如图,□ABCD中,AC⊥AB ,AB=3cm,BC=5cm,点E为AB上一点,且AE=
AB.点P从B点出发,以1cm/s的速度沿BC→CD→DA运动至A点停止. 则当运动时间为___ 秒时,
BEP为等腰三角形.
![](https://img.xkw.com/dksih/QBM/2014/11/20/1573757858676736/1573757864321024/STEM/359a7bff701b4c6fb5359aebc05e12a2.png?resizew=13)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/2014/11/20/1573757858676736/1573757864321024/STEM/7f9fee6f6b304adbb0e6bba2a36822af.png?resizew=176)
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【推荐2】如(图1)所示,E为矩形ABCD的边AD上一点,动点P、Q同时从点B出发,点P以1cm/秒的速度沿折线BE—ED—DC运动到点C时停止,点Q以2cm/秒的速度沿BC运动到点C时停止.设P、Q同时出发t秒时,
BPQ的面积为ycm2.已知y与t的函数关系图像如(图2)(其中曲线OG为抛物线的一部分,其余各部分均为线段),则下列结论: ①AD=BE=5;②当0<t≤5时,y=
t 2 ;③cos∠ABE=
;④当t=
秒时,
ABE∽
QBP;⑤当
BPQ的面积为
时,时间
的值是
或
;其中正确的结论是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1debdab68605fb5f68cc28aa6c5268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e835232c63d91a0cbab5020f8d53613f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/649a2586e9c485c44d5e69779fde5b1e.png)
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948642408603648/3063007001632768/STEM/b99c07455bf84bf99957a3f9a8e88787.png?resizew=306)
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