如图,在矩形
中,
,点
在直线
上,
与直线
相交所得的锐角为
,点
在直线
上,
,垂足为点
,与点
重合,
,以
为直径,在
的右侧作半圆
,点
是半圆
上任意一点.
(1)发现:连接
,则线段
的最大值为____________;
(2)矩形
保持不动,半圆
沿直线
向右平移,设平移距离为
.思考:点E落在边
上时,求半圆
与矩形
重合部分的面积
;
(3)探究:在平移过程中,当半圆
与矩形
的边相切时,直接写出
的值(参考数据:
结果保留根号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d83e40b26f6a76e7897353f5699db4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.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/12ebff0dbb3c8d73b02347f9864d2ec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a028fd5b281ef168702a803baca6e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)发现:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(2)矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(3)探究:在平移过程中,当半圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b01b0566c3f19032185d52cc508b11ee.png)
![](https://img.xkw.com/dksih/QBM/2020/5/4/2455668126105600/2457035924619264/STEM/ad373bf6-248a-41e9-a5dd-efadaa2fee97.png?resizew=430)
更新时间:2020-05-06 19:55:17
|
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解答题-证明题
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适中
(0.65)
【推荐1】如图,在
中,
,以
为直径的
分别交
边于点
.过点
作
于点
.
![](https://img.xkw.com/dksih/QBM/2021/1/26/2644367520202752/2652396485844992/STEM/8923ce43-0a2b-478f-961d-b9a9cf5dbe6a.png?resizew=216)
(1)求证:
是
的切线;
(2)
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f87b02b744534ae1ed700d21fcceb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2021/1/26/2644367520202752/2652396485844992/STEM/8923ce43-0a2b-478f-961d-b9a9cf5dbe6a.png?resizew=216)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e24a54ad34b7e67d82ad6ad23acb6537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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解答题-证明题
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适中
(0.65)
名校
【推荐2】如图,AB是⊙O的直径,⊙O交BC的中点于D,DE⊥AC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c2bf3dd4-cfff-4f6c-a1ef-1a2487bf512d.png?resizew=175)
(1)求证:DE是⊙O的切线.
(2)已知:BC=8cm,AD=3cm,求线段AE的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c2bf3dd4-cfff-4f6c-a1ef-1a2487bf512d.png?resizew=175)
(1)求证:DE是⊙O的切线.
(2)已知:BC=8cm,AD=3cm,求线段AE的长.
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐1】如图,AB,AC是⊙O的两条切线,B,C为切点,连接CO并延长交AB于点D,交⊙O于点E,连接BE,连接AO.
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(1)求证:AO∥BE;
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解答题-作图题
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适中
(0.65)
名校
【推荐2】如图,在△ABC中,∠A=90°,AB=3,BC=5.
(1)用圆规和直尺作出⊙P,使圆心P在AC边上,且与AB、BC两边都相切(保留作图痕迹,不写作法和证明).
(2)若在(1)的条件下,设⊙P与BC的切点为D,求⊙P的半径.
(1)用圆规和直尺作出⊙P,使圆心P在AC边上,且与AB、BC两边都相切(保留作图痕迹,不写作法和证明).
(2)若在(1)的条件下,设⊙P与BC的切点为D,求⊙P的半径.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/59eb3992-9e6f-472d-be94-84b216a7fa4a.png?resizew=180)
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