$\"\"$

The vertices are $\"\"$ and $\"\"$ .

Find the vectors u and v by using the vertices.

If $\"\"$ and $\"\"$ are the two vertices, then the component form of the vector u is

$\"\"$

If $\"\"$ and $\"\"$ are the two vertices, then the component form of the vector v is

$\"\"$

The cross product of $\"\"$ and $\"\"$ is

$\"\"$

Find the area of the triangle.

Consider u and v are the adjacent sides of the triangle.

So the area of the triangle is $\"\"$ .

$\"\"$

The area of the triangle is $\"\"$ .