1 . 三角形的三个顶点为 A(-2,4),B(-3,-1),C(1,3).
(1)求△ABC的面积S.
(2)过A作直线
,使B,C两点到
的距离相等,求直线
的方程.
(1)求△ABC的面积S.
(2)过A作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
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2 . 已知
的顶点坐标为
,
,
,则
边上的中线
的长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b1f7da40e8f6732069b3653a139aa77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6063fbeaf209d65be3c088fcb6bb2be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7284a2e151e316f48571971616cf80a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2019-06-08更新
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1178次组卷
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8卷引用:宁夏石嘴山市一中2019-2020学年高一上学期12月月考数学试题