* express as a linear combination of the vectors u= and v= .
* Show that the triangle AFG always constitutes the same fraction of the area of the Parallelogram ABCD.
i need help here. On the first question i have tryed to express the vector AG with other vectors to finally come to an linear combination of u and v. But i get problems whit any vector that ends at G. I suppose i should use the symmetry of the triangles somehow but dont really know how?
the other question i need some tips to get started.