Hi there, I must solve the next problem. The sentence says:

Find the area of a triangle wich vertex are the points: and .

What I did was define the vectors: y , considering the point is the origin, these vectors are y .

So I took the vectors and and then what I did was getting the module of the vectorial product, which is the area of the parallelogram conformed by these two vectors, and then I've divide it on two:

Then:

Is it right?

Bye, and thanks for commenting.