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在四边形ABCD中,若·=-||·||,·=||·||,则该四边形一定是()A.平行四边形B.矩形C.菱形D.正方形
题目详情
在四边形ABCD中,若 ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() 则该四边形一定是( )
|
在四边形ABCD中,若
·
=-|
|·|
|,
·
=|
|·|
|,
则该四边形一定是( )
![](https://www.zaojiaoba.cn/zhidao/pic/item/a8014c086e061d9567a0b28978f40ad163d9ca99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/11385343fbf2b21122d000ffc98065380dd78e81.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a8014c086e061d9567a0b28978f40ad163d9ca99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/11385343fbf2b21122d000ffc98065380dd78e81.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a9d3fd1f4134970a3292959e96cad1c8a6865d99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a9d3fd1f4134970a3292959e96cad1c8a6865d99.jpg)
则该四边形一定是( )
A.平行四边形 | B.矩形 | C.菱形 | D.正方形 |
在四边形ABCD中,若
·
=-|
|·|
|,
·
=|
|·|
|,
则该四边形一定是( )
![](https://www.zaojiaoba.cn/zhidao/pic/item/a8014c086e061d9567a0b28978f40ad163d9ca99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/11385343fbf2b21122d000ffc98065380dd78e81.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a8014c086e061d9567a0b28978f40ad163d9ca99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/11385343fbf2b21122d000ffc98065380dd78e81.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a9d3fd1f4134970a3292959e96cad1c8a6865d99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a9d3fd1f4134970a3292959e96cad1c8a6865d99.jpg)
则该四边形一定是( )
A.平行四边形 | B.矩形 | C.菱形 | D.正方形 |
在四边形ABCD中,若
·
=-|
|·|
|,
·
=|
|·|
|,
则该四边形一定是( )
![](https://www.zaojiaoba.cn/zhidao/pic/item/a8014c086e061d9567a0b28978f40ad163d9ca99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/11385343fbf2b21122d000ffc98065380dd78e81.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a8014c086e061d9567a0b28978f40ad163d9ca99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/11385343fbf2b21122d000ffc98065380dd78e81.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a9d3fd1f4134970a3292959e96cad1c8a6865d99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a9d3fd1f4134970a3292959e96cad1c8a6865d99.jpg)
则该四边形一定是( )
A.平行四边形 | B.矩形 | C.菱形 | D.正方形 |
在四边形ABCD中,若
·
=-|
|·|
|,
·
=|
|·|
|,
则该四边形一定是( )
![](https://www.zaojiaoba.cn/zhidao/pic/item/a8014c086e061d9567a0b28978f40ad163d9ca99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/11385343fbf2b21122d000ffc98065380dd78e81.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a8014c086e061d9567a0b28978f40ad163d9ca99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/11385343fbf2b21122d000ffc98065380dd78e81.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a9d3fd1f4134970a3292959e96cad1c8a6865d99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a9d3fd1f4134970a3292959e96cad1c8a6865d99.jpg)
则该四边形一定是( )
A.平行四边形 | B.矩形 | C.菱形 | D.正方形 |
![](https://www.zaojiaoba.cn/zhidao/pic/item/a8014c086e061d9567a0b28978f40ad163d9ca99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/11385343fbf2b21122d000ffc98065380dd78e81.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a8014c086e061d9567a0b28978f40ad163d9ca99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/11385343fbf2b21122d000ffc98065380dd78e81.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a9d3fd1f4134970a3292959e96cad1c8a6865d99.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](https://www.zaojiaoba.cn/zhidao/pic/item/a9d3fd1f4134970a3292959e96cad1c8a6865d99.jpg)
A.平行四边形 | B.矩形 | C.菱形 | D.正方形 |
▼优质解答
答案和解析
·
=-|
|·|
|,
·
=|
|·|
|,所以AB//CD,BC//AD,所以四边形ABCD是平行四边形.
A |
A
A
A
A
A 因为 ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
因为
·
=-|
|·|
|,
·
=|
|·|
|,所以AB//CD,BC//AD,所以四边形ABCD是平行四边形.
![](http://hiphotos.baidu.com/zhidao/pic/item/8326cffc1e178a82f6c5fa11f503738da877e882.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/cefc1e178a82b9011a544682708da9773812ef82.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/8326cffc1e178a82f6c5fa11f503738da877e882.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/cefc1e178a82b9011a544682708da9773812ef82.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/38dbb6fd5266d01623f81b99942bd40734fa3599.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/38dbb6fd5266d01623f81b99942bd40734fa3599.jpg)
因为
·
=-|
|·|
|,
·
=|
|·|
|,所以AB//CD,BC//AD,所以四边形ABCD是平行四边形.
![](http://hiphotos.baidu.com/zhidao/pic/item/8326cffc1e178a82f6c5fa11f503738da877e882.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/cefc1e178a82b9011a544682708da9773812ef82.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/8326cffc1e178a82f6c5fa11f503738da877e882.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/cefc1e178a82b9011a544682708da9773812ef82.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/38dbb6fd5266d01623f81b99942bd40734fa3599.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/38dbb6fd5266d01623f81b99942bd40734fa3599.jpg)
因为
·
=-|
|·|
|,
·
=|
|·|
|,所以AB//CD,BC//AD,所以四边形ABCD是平行四边形.
![](http://hiphotos.baidu.com/zhidao/pic/item/8326cffc1e178a82f6c5fa11f503738da877e882.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/cefc1e178a82b9011a544682708da9773812ef82.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/8326cffc1e178a82f6c5fa11f503738da877e882.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/cefc1e178a82b9011a544682708da9773812ef82.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/38dbb6fd5266d01623f81b99942bd40734fa3599.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/38dbb6fd5266d01623f81b99942bd40734fa3599.jpg)
因为
·
=-|
|·|
|,
·
=|
|·|
|,所以AB//CD,BC//AD,所以四边形ABCD是平行四边形.
因为![](http://hiphotos.baidu.com/zhidao/pic/item/8326cffc1e178a82f6c5fa11f503738da877e882.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/cefc1e178a82b9011a544682708da9773812ef82.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/8326cffc1e178a82f6c5fa11f503738da877e882.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/cefc1e178a82b9011a544682708da9773812ef82.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/38dbb6fd5266d01623f81b99942bd40734fa3599.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/38dbb6fd5266d01623f81b99942bd40734fa3599.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/8326cffc1e178a82f6c5fa11f503738da877e882.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/cefc1e178a82b9011a544682708da9773812ef82.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/8326cffc1e178a82f6c5fa11f503738da877e882.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/cefc1e178a82b9011a544682708da9773812ef82.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/38dbb6fd5266d01623f81b99942bd40734fa3599.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/ac6eddc451da81cb1f07067c5166d01608243199.jpg)
![](http://hiphotos.baidu.com/zhidao/pic/item/38dbb6fd5266d01623f81b99942bd40734fa3599.jpg)
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