如图,
是
的外接圆,
是
的直径,过点D的直线与
的延长线交于点P,过点B作
的垂线交
于点E, ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd50f364648139a954a2bacd44ea828.png)
是
的切线.
(2)若
求图中阴影部分的面积.
(3)若点 M 为半圆
的中点且在
下方,连接
,交
于点 N,连接
,若
,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd50f364648139a954a2bacd44ea828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db67993969ccff5948971976784a3d57.png)
(3)若点 M 为半圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb49a110acec1e86b8e8969300f0cd2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f606cb8b5a6b3e727e6a7b6b6b33b1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427589f0ba3947bfbbbbdcbda61e37c6.png)
更新时间:2024-04-12 17:46:54
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】在
中,
,以
为直径的
交
于点D,点E是边
的中点,连结
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/f1888f60-5ae5-47b2-a4a3-8232f6f6b6e9.png?resizew=179)
(1)求证:
是
的切线;
(2)若
,
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de36aec23d150489da9166675afc849b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee98db8495cf1f203abe99795102e20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9925407467278420029b8ab7b9561a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/f1888f60-5ae5-47b2-a4a3-8232f6f6b6e9.png?resizew=179)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9925407467278420029b8ab7b9561a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c85302e2d3d029538104e61f3651a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4a4de4234ec70c6ed5973a0c78e8c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9925407467278420029b8ab7b9561a.png)
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【推荐2】如图,等腰
是
的内接三角形,
,过点A作BC的平行线AD交BO的延长线于点D.
求证:AD是
的切线;
若
的半径为15,
,求AB的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882589c896c6993d9687f0e14a283481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edbe289ad89a4243903108709ce0381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6652e729301d2dfb5770b29e035d96b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edbe289ad89a4243903108709ce0381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edbe289ad89a4243903108709ce0381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0215fb92badc72f1e3dbdcf875fdac1.png)
![](https://img.xkw.com/dksih/QBM/2018/11/30/2086879602401280/2088636854788096/STEM/8c4ef6de-f6aa-4ae5-b625-62889ef7ca67.png?resizew=263)
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,
是
的直径,延长弦
到点
,使
,连接
,过点
作
,垂足为
.
(1)判断直线
与
的位置关系,并证明你的结论;
(2)若
的半径为6,
,延长
交
延长线于点
,求阴影部分的面积.
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0145eeb463f49ec362d52ef68dab367.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/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/03637eb5-0bf5-4a1c-96ba-513fccb2a646.png?resizew=163)
(1)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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【推荐2】如图,
的半径为4 cm,直线
交
于点B,C,
,
与
相切于点D,
.
(1)求点O到直线
的距离;
(2)求图中阴影部分的面积;
(3)若点Q从点B开始以每秒
的速度在
上绕点O顺时针旋转,求点Q经过几秒钟第一次到达点D.(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64e9de7c472fa2c13442c3f8afc08b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b551a21fa5980b468f3951089d184ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/d99f3c9c-c682-4601-a2be-2a3d7b847deb.png?resizew=223)
(1)求点O到直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(2)求图中阴影部分的面积;
(3)若点Q从点B开始以每秒
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1954b1c8c580c968c2191ff0544155.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b82c633823ee1dc9da06ed5ea20834d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f45ceeefb02cf306891fc81c31327ed.png)
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【推荐1】如图是由小正方形组成的
的网格,每个小正方形的顶点叫做格点,
的三个顶点都是格点,仅用无刻度的直尺在给定网格中完成画图,画图过程用虚线表示.
(1)图1中,在
上画点P,使
;在
上画点H,使
;
(2)图2中,在
上画点Q,连
,使
;
(3)图3中,点D是
内一个格点,如图所示,在
上画点M,使
值最小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15f59e7ba0ef456ddc71308dbc4a3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/15/0fe6084a-5002-4775-813a-54077dcba7a2.png?resizew=612)
(1)图1中,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90c7363b19741ced55c95a1b090e410b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ab97d8cfc1766469c8d0449aaab2bd4.png)
(2)图2中,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a7b6bf571bc7ed052e5f1430fb8f24.png)
(3)图3中,点D是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c8c210650b91825d919c5cc1cf0ae6.png)
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解答题-作图题
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适中
(0.65)
【推荐2】如图,在△ABC中,∠ACB = 90°,D是BC的中点,过点C作CE⊥AD,交AD于点E,交AB于点F,作点E关于直线AC的对称点G,连接AG和GC,过点B作BM⊥GC交GC的延长线于点M .
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986376216297472/2990385707843584/STEM/fd86d659-415f-468f-9b68-38b5be60e3d5.png?resizew=184)
(1)① 根据题意,补全图形;
② 比较∠BCF与∠BCM的大小,并证明.
(2)过点B作BN⊥CF交CF的延长线于点N,用等式表示线段AG,EN与BM的数量关系,并证明.
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986376216297472/2990385707843584/STEM/fd86d659-415f-468f-9b68-38b5be60e3d5.png?resizew=184)
(1)① 根据题意,补全图形;
② 比较∠BCF与∠BCM的大小,并证明.
(2)过点B作BN⊥CF交CF的延长线于点N,用等式表示线段AG,EN与BM的数量关系,并证明.
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解题方法
【推荐3】我们知道,三角形的三条中线一定会交于一点,这一点就叫做三角形的重心.重心有很多美妙的性质,如:在线段比、面积比就有一些“漂亮”结论,利用这些性质可以解决三角形中的若干问题,请你利用重心的概念完成如下问题:
(1)若
是
的重心(如图),连结
并延长交
于
,证明:
;
![](https://img.xkw.com/dksih/QBM/2019/6/10/2222636098543616/2223451401961472/STEM/76249928f74b4812b532b1b15989795d.png?resizew=141)
(2)若
是
的一条中线(如图),
是
上一点,且满足
,试判断
是
的重心吗?如果是,请证明;如果不是,请说明理由;
![](https://img.xkw.com/dksih/QBM/2019/6/10/2222636098543616/2223451401961472/STEM/3fb120b4b05c4a00ae88c3e842aacfa8.png?resizew=150)
(3)若
是
的重心,过
的一条直线分别与
、
相交于
、
(均不与
的顶点重合)(如图),求证:
.
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317da77b7e4cb9dfeb268bd9169b21cb.png)
![](https://img.xkw.com/dksih/QBM/2019/6/10/2222636098543616/2223451401961472/STEM/76249928f74b4812b532b1b15989795d.png?resizew=141)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317da77b7e4cb9dfeb268bd9169b21cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2019/6/10/2222636098543616/2223451401961472/STEM/3fb120b4b05c4a00ae88c3e842aacfa8.png?resizew=150)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df28b177d4a4880fa77ec2c9a9bf94bb.png)
![](https://img.xkw.com/dksih/QBM/2019/6/10/2222636098543616/2223451401961472/STEM/fc8bc8227c114f6ababe03464498c4e5.png?resizew=147)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,在Rt△ABC中,∠ACB=90°,AC=6,∠B=30°,M是AB上一点,以点M为圆心,MB为半径作⊙M交BC于点D.
![](https://img.xkw.com/dksih/QBM/2022/4/4/2951001197051904/2953215894355968/STEM/7d7732c222534ce5b65582ac57729e90.png?resizew=414)
(1)如图1,若⊙M恰好与AC相切,求⊙M的半径.
(2)如图2,若AM=2MB,连接AD,求证:AD是⊙M的切线.
![](https://img.xkw.com/dksih/QBM/2022/4/4/2951001197051904/2953215894355968/STEM/7d7732c222534ce5b65582ac57729e90.png?resizew=414)
(1)如图1,若⊙M恰好与AC相切,求⊙M的半径.
(2)如图2,若AM=2MB,连接AD,求证:AD是⊙M的切线.
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解答题-证明题
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适中
(0.65)
【推荐2】如图,
内接于
,
为直径,
于点
,延长
交
于点
,过
作
的切线
,与
的延长线交于点
,连接
交
于点
,连接
.
为矩形;
(2)求证:
;
(3)若
(m为常数),求
(用含m的代数式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e99cd1610de98c8332da8c4520aad6e.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41c2d7ae6aaf6d91129ed5221a415a7.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9c7e2c579d2f97279e9363fa252dc8.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbda8e8877e76bfe13ed4cca00716cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/593945d9f487551c01b079fd2bc91317.png)
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