Answer: a + b.
- A a - b
- B a + b
- C a x b
- D a . b
Correct answer: B. a + b
Explanation: Triangle law: place vectors head to tail; the closing side (from tail of a to head of b) is a + b.
Triangle law of vector addition: placing vector b at the head of vector a, the diagonal from the start to the final head gives the resultant a + b.
Concept context
Vectors, dot product, cross product, and geometric applications