Given $2$, $2D$ vectors we can calculate the angle inside these vectors using either dot or cross product. - (And presumably many other methods too)
Given $3$, $3D$ vectors, how would I calculate the solid angle inside them?
Given $4$, $4D$ vectors, how do I calculate the 4-angle inside of them?
And then finally, $5$, $5D$ vectors same question.
My problem is actually in 5 dimensions, so that's the one I'm most interested in. Though it would be lovely to see a pattern emerge from calculation to calculation.
Thank you in advance