如图,在
中,
,以
为直径的
与
交于点
,点
是
的中点,连接
,
.
(1)求证:
是
的切线;
(2)若
,
,求
的长;
(3)在(2)的条件下,点
是
上一动点,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/27/a9f701a1-6500-44fb-8749-a45b587e7f41.png?resizew=145)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/583effa35880ba5704dfc4ae4e48a6fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(3)在(2)的条件下,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a13ec9a812274ad0839f20ba17348687.png)
更新时间:2023-08-26 13:13:49
|
相似题推荐
解答题-问答题
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(0.85)
【推荐1】如果a,b是空间中的两条直线,判断下列命题的真假.
(1)a与b要么相交,要么不相交;
(2)a与b要么相交,要么平行;
(3)当a与b不相交时,a与b要么平行,要么异面.
(1)a与b要么相交,要么不相交;
(2)a与b要么相交,要么平行;
(3)当a与b不相交时,a与b要么平行,要么异面.
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名校
【推荐2】如图,在
中,
,
,
,以其三边为边向外作正方形.点
是
边上的一个动点,连结
,并延长交
于点
,连结
.当
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc29330979e64e99678423e58759779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b808b24ca39c5e370bda0b39650a3c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/558a1e4b-df7e-4f83-a436-c434471f69e5.png?resizew=172)
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解答题-作图题
|
较易
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名校
【推荐1】如图,在平面直角坐标系中,已知
三个顶点的坐标分别为
,
,
.
(1)以点O为位似中心,将
缩小为原来的
,得到
,在y轴的右侧画出
;
(2)在(1)的条件下,写出点A、B、C的对应点
、
、
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f8984a42bcc4d9fe2283139653c3e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa1b000a94d63d0b32f6f14b78e58b30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e24f172a287592897ea4378a2ad29013.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/16/ffef853c-2f29-41d2-90f6-a60c152b39b8.png?resizew=241)
(1)以点O为位似中心,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)在(1)的条件下,写出点A、B、C的对应点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
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解答题-证明题
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【推荐2】实践操作:
第一步:如图1,将矩形纸片
沿过点
的直线折叠,使点
落在
上的点
处,得到折痕
,然后把纸片展平.
第二步:如图2,将图1中的矩形纸片
沿过点
的直线折叠,点
恰好落在
上的点
处,点
落在点
处,得到折痕
交
于点
交
于点
,再把纸片展平.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/3274c214-8391-4e0d-acc1-1db0495f3bed.png?resizew=293)
问题解决:
(1)如图1,填空:四边形
的形状是__________.
(2)如图2,线段
与
是否相等?若相等,请给出证明;若不等,请说明理由;
(3)如图2,若
,求
的值.
第一步:如图1,将矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
第二步:如图2,将图1中的矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/765ea5b7cfea102af1be802787ed42eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3275edb14633cbd5fae25fcc0276628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/3274c214-8391-4e0d-acc1-1db0495f3bed.png?resizew=293)
问题解决:
(1)如图1,填空:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0054610b07c11f3cb88aa87b58c2df11.png)
(2)如图2,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/199336204fbca97766bf24b1dc5fdc53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33bd96f676101869a9f1bc692066c12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd13e6bd1e3d7815d82b6fe073123af5.png)
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