1 . 已知
中,点
为
所在平面内一点,则“
”是“点
为
重心”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0a72db66d26e643246199f102245b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
2023-11-27更新
|
948次组卷
|
6卷引用:江苏省镇江市2023-2024学年高三上学期期中考试数学试卷
江苏省镇江市2023-2024学年高三上学期期中考试数学试卷(已下线)重难点4-2 奔驰定理及三角“四心”向量式(5题型+满分技巧+限时检测)(已下线)专题1 透视四心 向量处理【练】(已下线)重难点专题02 平面向量痛点问题之三角形“四心”问题-【帮课堂】(苏教版2019必修第二册)6.4.1平面几何中的向量方法练习(已下线)专题1.10 奔驰定理及三角形的四心-重难点突破及混淆易错规避(人教A版2019必修第二册)
2 . 在等腰直角三角形
中,已知
,点D,E分别在边
,
上,
.
(1)若D为
的中点,三角形
的面积为4,求证:E为
的中点;
(2)若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
(1)若D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d6ceed6e5a36193bcb5a557853dbee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2021-11-17更新
|
597次组卷
|
2卷引用:江苏省苏州市2021-2022学年高三上学期期中数学试题
名校
解题方法
3 . 如图,已知
为半圆
的直径,长度为2,点
在半圆
上,点
在弦
上,且
,
,
,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53c5c933809f62eadd8ef4f68fea656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77e2ada7d90e7143be104f74dc1ae9d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea93d2a54b81a3667cbd49250335a22.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/14d460b3-66b6-49fc-a8ee-f698dc2f3f9f.png?resizew=230)
您最近一年使用:0次
4 . 如图,点
为△
的重心,且
,
,则
的值为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d9a7b881dd04ffc14380053ae94f259.png)
![](https://img.xkw.com/dksih/QBM/2016/12/2/1573196334628864/1573196340715520/STEM/ce4270606fec465e82859a6c677f956b.png?resizew=149)
您最近一年使用:0次
2016-12-05更新
|
769次组卷
|
2卷引用:2017届江苏南通中学高三上期中数学(理)试卷