1. Zapiši vektor $\overset{\Large\rightharpoonup}{FH}$ kot linearno kombinacijo vektorjev $\overset{\rightharpoonup}{a}$ in $\overset{\rightharpoonup}{b}$.
Vektorji, ki ležijo v isti ravnini ali v vzporednih ravninah, so koplanarni. Vektorji, ki niso komplanarni, so nekoplanarni.
K $\overset{\Large\rightharpoonup}{BC},\overset{\Large\rightharpoonup}{BG}$ N $\overset{\Large\rightharpoonup}{AB},\overset{\Large\rightharpoonup}{AD},\overset{\Large\rightharpoonup}{AE}$ K $\overset{\Large\rightharpoonup}{AB},\overset{\Large\rightharpoonup}{AD},\overset{\rightharpoonup}{0}$