1 . 已知:正方形ABCD的边长为1点M是边AD的中点以M为圆心AD为直径作圆,点E在线段AB上,且直线CE与圆相切.求△CBE的面积.
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2 . △ABC中,
.在△ABC外部,到点B、C的距离小于6的点组成的集合,所覆盖平面区域的面积是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec040d5bc0ef3854941150d63824193.png)
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3 . 如图,在△ABC中,AB=30,AC=20,S△ABC=210,D、E分别为边AB、AC的中点,∠BAC的平分线分别与DE、BC交于点F、G,则四边形BGFD的面积为________ .
![](https://img.xkw.com/dksih/QBM/2020/5/11/2460512482050048/2460599838826496/STEM/268010ae7cba4b55bd0742c71ffaf257.png?resizew=179)
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4 . 如图,点A、B、C、D、E在一条直线上顺次排列,满足BC=CD=
,点P在该直线外,满足PB=PD.点K、L分别在线段PB、PD上,满足KC平分∠BKE,LC平分∠ALD.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/64accebd-3f5b-46d0-9188-4dc597a8e6e8.png?resizew=216)
证明:A、K、L、E四点共圆.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0882a69a868ba06e26ff29ebbdc701.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/64accebd-3f5b-46d0-9188-4dc597a8e6e8.png?resizew=216)
证明:A、K、L、E四点共圆.
您最近一年使用:0次
5 . 如图,在
中,
,点
为
的中点,点
为线段
垂直平分线上的一点,且
,固定边
,在平面
内移动顶点
,使得
的内切圆始终与
切于线段
的中点,且
、
在直线
的同侧,在移动过程中,当
取得最小值时,
的面积为( )
![](https://img.xkw.com/dksih/QBM/2020/4/23/2447897858531328/2448293316263936/STEM/8a1f08e6-e7b4-4b32-95ac-3781d027dabc.png?resizew=289)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57dfc9d1109fe41145cc892b5702d9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af39d419d52fa182ea7c14b4cc8b4e2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa79265fc0d0f10b2289408f6c322347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2020/4/23/2447897858531328/2448293316263936/STEM/8a1f08e6-e7b4-4b32-95ac-3781d027dabc.png?resizew=289)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-04-24更新
|
241次组卷
|
2卷引用:2020届全国100所名校最新高考模拟示范卷高三理科数学(四)试题
6 . 如图,在
中,
为
边上的高线.
为三角形内一点,由
向三角形三边作垂线,垂足分别为
,
,
,已知
,
,
,
依次构成公差为1的等差数列.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/b3b5eae2-36c0-4719-b27a-c137e5ebc98e.png?resizew=200)
(1)求
的面积;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efa8299316c747f7e8c54ee2b073a17d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca9e36c5987d6730e846753e0552c7d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c178c9abab25de6a69a3d5b98c55bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/b3b5eae2-36c0-4719-b27a-c137e5ebc98e.png?resizew=200)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fce32bd941595be3880d48c16e0495.png)
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7 . 如图,分别以
的两边
为边向外作正三角形
及
,设
交于
用复数证明:
且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83515d91f26944fa2ad00fcbe76a6a94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6c03b3e996be358f19f7014fef026e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bcfdccb24c195e2be43b6c89214feef.png)
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2020-01-31更新
|
747次组卷
|
6卷引用:人教B版(2019) 必修第四册 逆袭之路 第十章 复数 本章小结
人教B版(2019) 必修第四册 逆袭之路 第十章 复数 本章小结(已下线)第19讲压轴综合题(讲义)-【教育机构专用】2021年春季高一数学辅导讲义(沪教版2020必修第二册)(已下线)第十章 复数 本章小结(已下线)7.3复数的三角表示C卷人教B版(2019)必修第四册课本习题第十章本章小结(已下线)第七章 复数(基础、典型、易错、压轴)分类专项训练(2)
名校
8 . 如图,直线
,点
是
之间的一个定点,过点
的直线
垂直于直线
,
(
为常数),点
分别为
上的动点,已知
.设
(
).
![](https://img.xkw.com/dksih/QBM/2020/1/30/2388072192073728/2388181329387520/STEM/259f8d3625d64876909c2ad47f08f89a.png?resizew=186)
(1)求
面积
关于角
的函数解析式
;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1095c036b49c3327baaa2c3c7f746134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f419750fe2e81297e21646268adb07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da24c3c749a2daba3d3a5136c16fdb24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50515b0461f55861fd28f2774a2f01dc.png)
![](https://img.xkw.com/dksih/QBM/2020/1/30/2388072192073728/2388181329387520/STEM/259f8d3625d64876909c2ad47f08f89a.png?resizew=186)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8135ce2fc33a303efd2087106709d44e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8135ce2fc33a303efd2087106709d44e.png)
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2020-01-30更新
|
1100次组卷
|
7卷引用:江苏省无锡市2019-2020学年高一上学期期末数学试题
名校
9 . 设
分别是
的三边长,且
,则
的关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab46b3b061b35604f6c085065a7ad0cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de7ff93de861f5f2a5cc6339cfecb3a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
10 . 曲线
在点
处的切线与坐标轴围成的三角形的面积是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c185529266ee05b4ac0c6c6c8c2ac6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d25e70d37af93796965efc8d342185.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-12-21更新
|
600次组卷
|
2卷引用:山西省朔州市怀仁县第一中学2018-2019学年高二下学期期中数学(文)试题