![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
在平面直角坐标系中,点A的坐标为(-1,2),点B的坐标为(-2,-1),点C的坐标为(2,1),则△ABC的面积为()
A.5
B.6
C.7
D.8
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
A、5
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.5
B.6
C.7
D.8
A、5
A.(4,2)
B.(5,2)
C.(5,3)
D.(6,2)
A.(-2,1)
B.(0,1)
C.(7,-1)
D.(2.5,0)
A.(4,2)
B.(5,2)
C.(6,2)
D.(5,3)
A.(-1,1)
B.(1,1)
C.(-1,-2)
D.(1,-2)
A.(-2,-4)
B.(-4,-2)
C.(-1,-4)
D.(1,-4)
A.(-1,5)
B.(-9,45)
C.(-1,5)或(1,5)
D.(-1,5)或(-9,45)
A.(﹣1,1)
B.(﹣1,﹣2)
C.(﹣1,2)
D.(1,2)