| -1-5 |
| -2-(-1) |
| -6 |
| -1 |
∴AB边高线斜率k=-
| 1 |
| 6 |
∴AB边上的高线的点斜式方程为y-3=-
| 1 |
| 6 |
化为一般式可得x+6y-22=0;
(2)由(1)知直线AB的方程为y-5=6(x+1),即6x-y+11=0,
∴C到直线AB的距离为d=
| |24-3+11| | ||
|
| 32 | ||
|
| 32 |
| 37 |
| 37 |
又∵|AB|=
| (-1+2)2+(5+1)2 |
| 37 |
∴三角形ABC的面积S=
| 1 |
| 2 |
| 1 |
| 2 |
| 37 |
| 32 |
| 37 |
| 37 |
| -1-5 |
| -2-(-1) |
| -6 |
| -1 |
| 1 |
| 6 |
| 1 |
| 6 |
| |24-3+11| | ||
|
| 32 | ||
|
| 32 |
| 37 |
| 37 |
| (-1+2)2+(5+1)2 |
| 37 |
| 1 |
| 2 |
| 1 |
| 2 |
| 37 |
| 32 |
| 37 |
| 37 |