如图,在平面直角坐标系中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/74b2d653-6b13-4f10-98ce-494b60426e44.png?resizew=161)
(1)求点B,C的坐标;
(2)求证:四边形OABC为等腰梯形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fcc47bfcba4d30debec0bf1d620477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/719b93a3a78cab66d5bf4a376631acce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d1aefe83700d40b0e821c973f83eb7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/74b2d653-6b13-4f10-98ce-494b60426e44.png?resizew=161)
(1)求点B,C的坐标;
(2)求证:四边形OABC为等腰梯形.
19-20高一下·山东潍坊·阶段练习 查看更多[7]
山东省潍坊市2019-2020学年高一4月阶段考试数学试题山东省博兴县第一中学2019-2020学年高一下学期开学检测数学试题(已下线)专题6.2 平面向量的基本定理及坐标表示(精练)-2021年新高考数学一轮复习学与练(已下线)专题6.2 平面向量的基本定理及坐标表示(练)-2021年新高考数学一轮复习讲练测(已下线)专题6.2向量基本定理与向量的坐标(B卷提升篇)-2020-2021学年高一数学必修第二册同步单元AB卷(新教材人教B版)江苏省徐州市沛县2020-2021学年高一下学期第一次学情调研数学试题河北省高碑店市崇德实验中学2023届高三上学期第二次月考数学试题
更新时间:2020-04-17 16:58:58
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【推荐1】设点
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(1)若点
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(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐2】在
中,角
,
,
所对的边分别为
,
,
,且
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(1)若
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(2)若
,
,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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(1)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bec498bc31278318548fde37c44212ca.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70410f095a6d5b4b66ece2ad7bf1e461.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2679bb0177f68d4c6e80a9a66bca9348.png)
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【推荐3】如图,在△ABC中,M是边BC的中点,N是线段BM的中点.
![](https://img.xkw.com/dksih/QBM/2021/7/3/2756375670046720/2760343463895040/STEM/2583daeb-428f-46ee-874b-db2935098e2a.png?resizew=214)
(1)若
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(2)若
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![](https://img.xkw.com/dksih/QBM/2021/7/3/2756375670046720/2760343463895040/STEM/2583daeb-428f-46ee-874b-db2935098e2a.png?resizew=214)
(1)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3a059203f65774fd8f321faa9e8041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bea3b7a66f2201648dacaa90e413f41.png)
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【推荐1】如图所示,
,
,
均为边长为
的正三角形,点
,
在线段
上,点
在线段
上,且满足
, 连接
、
,设
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/9f286c08-a7d9-43a2-a38c-358ec99f522f.png?resizew=295)
试用
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1dc5667bbf205d6c6c6d189ebda123e.png)
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解题方法
【推荐2】在平面直角坐标系
中,点
,
,记
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.
(1)设
在
上的投影向量为
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(2)若四边形
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
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(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
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(2)若四边形
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