解题方法
1 . (多选)已知三角形的三个顶点分别为
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b62194097ac66a5093c57fca2f5b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e584f799ea554fc5533925ead4672501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca1bf8899b8865afe102aec97e340e45.png)
A.边![]() ![]() |
B.三角形![]() |
C.三角形![]() ![]() |
D.三角形![]() ![]() |
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解题方法
2 . 已知直线方程为
,其中
.
(1)当
变化时,求点
到直线的距离的最大值;
(2)若直线分别与x轴、y轴的负半轴交于A,B两点,求△AOB面积的最小值及此时的直线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cadd4cfce20dc27aa13c67afe46d2ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e72f6b2ef3329828cb8fc873eeba7c.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a149da548c87b345e0672cd47c8a02bb.png)
(2)若直线分别与x轴、y轴的负半轴交于A,B两点,求△AOB面积的最小值及此时的直线方程.
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解题方法
3 . 某市为了改善城市中心环境,计划将市区某工厂向城市外围迁移,需要拆除工厂内一个高塔,施工单位在某平台
的北偏东
方向
处设立观测点
,在平台
的正西方向
处设立观测点
,已知经过
三点的圆为圆
,规定圆
及其内部区域为安全预警区.以
为坐标原点,
的正东方向为
轴正方向,建立如图所示的平面直角坐标系.经观测发现,在平台
的正南方向
的
处,有一辆小汽车沿北偏西
方向行驶,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/cb80994e-f8af-4449-a24d-75def3cda441.png?resizew=162)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c86636a2be827e96ef13a7e9611dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e5a9f3e8d5195407764713fb5ff259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06f5e21d225bf3c159ddf3876fbb8fb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92f256afee1098dac22f423b19b43c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/cb80994e-f8af-4449-a24d-75def3cda441.png?resizew=162)
A.观测点![]() ![]() |
B.圆C的方程为![]() |
C.小汽车行驶路线所在直线的方程为![]() |
D.小汽车不会进入安全预警区 |
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解题方法
4 . 下列说法正确的有( )
A.直线![]() ![]() |
B.过点![]() ![]() ![]() |
C.两条平行直线![]() ![]() ![]() |
D.经过点![]() ![]() |
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5 . 已知光线经过点
,在直线
上反射,且反射光线经过点
,求:
(1)入射光线与直线l的交点.
(2)入射光线与反射光线所在直线的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3ccc38868099bc4d542e00e0b66685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4690597bc0883f8932494c135a11433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b0a807a550b61acd46aa4f8677dd6d3.png)
(1)入射光线与直线l的交点.
(2)入射光线与反射光线所在直线的方程.
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解题方法
6 . 抛物线有如下光学性质:过焦点的光线经拋物线反射之后得到的光线平行于抛物线的对称轴:反之,平行于抛物线对称轴的入射光线经抛物线反射后必过抛物线的焦点.已知抛物线
的焦点为
,一条平行于
轴的光线从点
射出,经过拋物线上的点
反射后,再经抛物线上的另一点
射出,则
的周长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85d23fc512ad69a2d5919ce690407704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
7 . 如图,8个半径为1的圆摆在坐标平面的第一象限(每个圆与相邻的圆外切或与坐标轴相切),若斜率为3的直线
将8个圆分成面积相等的两部分,则直线
的方程是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/8a8712fd-0357-45fc-9263-5aaa47213d8a.png?resizew=165)
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解题方法
8 . 设双曲线
,斜率为1的直线l与
交于
两点,当l过
的右焦点F时,l与
的一条渐近线交于点
,
(1)求
的方程;
(2)若l过点
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77d2b05d20e954445dd0f4b373830f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858856116c3024f06a07bce365d705ac.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
(2)若l过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6554ac3dff4a59833e407db887f6e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaff41080fdea43eea7efedf9ebc1498.png)
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9 . 一条直线经过点
,被圆
截得的弦长等于8,这条直线的方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75bb708d1450f9222c3a3a6d7682e06c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a143573e9fe53e6a861154bf5b4c27c3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
10 . 已知
的三个顶点
,
,
.
(1)求
边上中线
所在直线的方程;
(2)已知点
满足
,且点
在线段
的中垂线上,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eae019053ae564f08c01487f7ff7986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02af485e17e7628fd5a3ace6e0a32ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56949d0020ef52ab9e2ce39c8d992afa.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e381acbbddb8a60dfac175402ea1202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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