Mathematics for IGCSE & O level - Vectors (Section 4 - No. 24)
If OA = a, OB = b, and the point C is such that OC = a + b, what is the geometrical shape of OACB?
A triangle
A kite
A parallelogram
A rectangle
解释
If OC is the vector a + b, then it completes the parallelogram.