名校
1 . 如图,已知
是
的直径,弦
与直径
相交于点
.点
在
外,作直线
,且
.
![](https://img.xkw.com/dksih/PilotRun/2019/10/9/2308152996413440/2314881509220352/EXPLANATION/fb21d114d2184553925dd4cfc07b8e7a.png?resizew=143)
(1)求证:直线
是
的切线.
(2)若
,
,
,求
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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0513a30a20818b08dc6ea26e2c86492.png)
![](https://img.xkw.com/dksih/PilotRun/2019/10/9/2308152996413440/2314881509220352/EXPLANATION/fb21d114d2184553925dd4cfc07b8e7a.png?resizew=143)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/154c7f681d6ed9ba848f2dd3ac04a5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91dad3d14c9ce550215929f248facc73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
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2 . 如图,在等腰
中,
,I为内心,M为
的中点,P为边
上一点,满足
,
延长线上一点H满足
,Q为
的外接圆上劣弧
的中点.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9020059d62af7498039f091de6f005ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38b65a033fdfdfd9b2f92fcf6a6e9358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede935419d69a161bb22fd513647da06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d81985e01bb58221a3a40c6a890999.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/4ec1729aaac6b3de336c3b4d75117a2d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/3b5b1491-ba9d-4cd2-b290-0bd7ad8f7ca3.png?resizew=165)
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3 . 菱形
的边长为6,
,如果点
是菱形内一点,且
,则线段
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b903021571c1b57943a1a3274217654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2418a4e59a3d9a27cda7c51c8c7df441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() ![]() |
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解题方法
4 . 已知
的面积为3,在
所在的平面内有两点P,Q,满足
,
,记
的面积为S,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d426458688a8b8edc7d5d4f854a3c21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60bfa71de5c7b5d49fc22c3a0c469780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-10-16更新
|
1157次组卷
|
4卷引用:湖南省怀化市2019-2020学年高一下学期期末数学试题
湖南省怀化市2019-2020学年高一下学期期末数学试题山东省济宁市兖州区2020-2021学年高一下学期期中考试数学试题(已下线)考点34 平面向量的应用举例-备战2021年高考数学经典小题考前必刷(新高考地区专用)(已下线)专题24 平面向量的几何运算与坐标运算-备战2022年高考数学一轮复习一网打尽之重点难点突破
5 . 如图所示,在
中
,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c978d92edf0c4c1ef8620c17df75d35e.png)
______ .
![](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/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd16fc111a66466a024e4f703ff7c8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c978d92edf0c4c1ef8620c17df75d35e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/dfde4d8c-4cb3-4175-b295-f8cd4f45bbd4.png?resizew=192)
您最近一年使用:0次
6 . 如图所示,
是
的中线,
是
边的三等分点,
交
于点
,则
为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/0eed1160-59cc-40b2-9662-8b91e72c394d.png?resizew=206)
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d3e8e3c15abb4d469d8f40cbac3cef1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/0eed1160-59cc-40b2-9662-8b91e72c394d.png?resizew=206)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7 . 如图,在
中,弦
与直径
垂直,垂足为
,
的延长线上有一点
,满足
.过点
作
,交
的延长线于点
,连接
交
于点
.
![](https://img.xkw.com/dksih/QBM/2020/9/11/2547342614913024/2549117443334144/STEM/0ea639c3-6177-489d-a3d1-1a2afcf337be.png)
(1)求证:
是
的切线;
(2)如果
,
,求
的值;
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e03c4b1644e145df9c62035a9c98f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd378d3805a3d8295aec88bf3684f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/2020/9/11/2547342614913024/2549117443334144/STEM/0ea639c3-6177-489d-a3d1-1a2afcf337be.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9419302c045670b2f7384d6b0e7b7738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098a96d1e67d5e74d6122c8dfa63f183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
您最近一年使用:0次
8 . 如图,已知AD为△ABC的角平分线,DE//AB交AC于点E.如果
=
,那么
=( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/ae481197-971a-4afb-b945-913fc6a34a94.png?resizew=181)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fcda8436a5e68816b74177e6d51cba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea79586df2029edb34c7cb2f67dc3722.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/ae481197-971a-4afb-b945-913fc6a34a94.png?resizew=181)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 如图,在△
中,
平分
,交
于点
,
,垂足为
,若
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/19c94fd1-9620-4d8a-8862-81403c2da3c3.png?resizew=180)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8bc46c003920c92d43930a0cbe43cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.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/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/19c94fd1-9620-4d8a-8862-81403c2da3c3.png?resizew=180)
A.6 | B.![]() | C.![]() | D.![]() |
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