Find the area of the parallelogram with vertices (5,1), (8, 6), (12, 9), and (15, 14)
How would I start this problem?
have a look how it's done ...
Area of Parallelogram from Vector Cross Product
Allie, a sketch always helps. What you're doing is... You're finding the vector of a diagonal of the parallelogram BC instead of the adjacent side, AC. Calculate the vector product $\displaystyle \vec{AB}\times\vec{AC}$.
I hope that helps.
ILoveMaths07.