如图,
为
的直径,
为弦,
切
于点
,与
的延长线相交于点
,与
的延长线相交于点
,且
.
,
,求
的长;
(2)求证:
是
的中点.(请用两种证法解答)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1c122603b60b6f1a1334ddb56c3fb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef77bf5bc7ce78075a0245dae061b0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26ad70d2b3aac8604834d57dfc59bb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
更新时间:2024-05-22 16:03:12
|
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解答题-作图题
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适中
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【推荐1】某居民小区一处圆柱形的输水管道破裂,维修人员为更换管道,需确定管道圆形截面的半径,如图是水平放置的破裂管道有水部分的截面.
(1)请你用直尺和圆规作出这个输水管道的圆形截面的圆心(保留作图痕迹);
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解答题-证明题
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【推荐2】如图,已知
是
的直径,B、C为圆上的点,
、
,垂足分别为E、F.
(1)求证:
;
(2)若
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,求阴影部分的面积.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178e3fa2e4de57a4c067e79be7d798e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d72a007e3c4a134956b0e3fbde5f46.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/15/99937315-ce40-4c16-ada2-74d77afd88ba.png?resizew=141)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3071a398c59c34d68dac9ba09a7a46c9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e4dbea6a5faecdd8f6c06cf9fd43a90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,已知
是
的直径,点
在
上,点
在
外,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/0a302f46-f6e3-4f21-bc5a-121498cf99c7.png?resizew=121)
(1)求证:
是
的切线;
(2)当
时,求劣弧
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c29a7e8eea08197bf53164a560bee58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049a02e104a6f3146f9b6303fdf59693.png)
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(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
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解答题-作图题
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适中
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名校
【推荐2】在网格中,每个小正方形的顶点称为格点,点A、B、C、D、M、N均为格点,请仅用无刻度的直尺按要求完成以下作图(保留作图痕迹).
(1)如图1是以格点O为圆心,
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(2)如图2是以格点O为圆心的圆,在弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,在△ABC中,
,以AB为直径作
交BC于点D,过点D作
的切线交AC于点E,交AB的延长线于点F.
![](https://img.xkw.com/dksih/QBM/2022/3/11/2933837668843520/2964236687933440/STEM/ad345c69-1c2b-4ef8-af29-8e1a82ea5991.png?resizew=166)
(1)求证:
;
(2)若
,
,求BF的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2022/3/11/2933837668843520/2964236687933440/STEM/ad345c69-1c2b-4ef8-af29-8e1a82ea5991.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de4a54cc7818be87a239f6de5f5d05b.png)
(2)若
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解答题-证明题
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适中
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【推荐2】如图所示,
中
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过点
并于
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与
交于点
,
于
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(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eddf629bfb2d7b9daea6f2c1553360af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
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(1)求证:
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(2)若
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解答题-计算题
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适中
(0.65)
【推荐1】如图所示,在正方形ABCD中,点P是射线CB上的一个动点.连接PA,PD点M,点N分别为BC,AP的中点,连接MN交PD于点Q.点
与点P关于直线AB对称,且点
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,若点Q恰好在直线
上,正方形ABCD的边长为2,请写出求此时BP长的思路.(可以不写出计算结果)
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您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,直线
分别交直线
于点A、B、C,交直线
于点D、E、F,且
,已知
,
.
(1)求
的长;
(2)当
,
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8801df26d9cb76bc289b64a3a26902e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f2813ee8f26cca880b6427f5f545d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f5ad482f40a92de6cb22fe0da582ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b64254ccf2bf88337f4e88055a0cc4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67a6b21e48553fe9704a30870b5016a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f769d040ba926b022c56960e1b2677.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/29/b71c003b-cf04-4257-9157-67a5ecc979e5.png?resizew=161)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6813cfccfba3043fc567b0dadf76d229.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
您最近一年使用:0次