What point do you pivot on in your vector triangle?

• A. E
• B. X
• C. V
• D. N

Answer: (A)

Pivoting in a vector triangle means choosing the vertex around which you rotate one vector to connect with the other, so the two sides form a triangle. That fixed vertex is the pivot. In this diagram, the point labeled E is the pivot, because you place one vector with its tail at E and then swing/attach the second vector so its tail matches the head of the first, forming the triangle. The other points X, V, and N are the other corners of the triangle and don’t serve as the pivot.