Answer
See the figure below.
Work Step by Step
The parallelogram shows that one obtains the same vector by adding $a+b$ or by adding $b+a$. See the figure below.
Calculus (3rd Edition)
by Rogawski, Jon; Adams, Colin
Published by
W. H. Freeman
ISBN 10:
1464125260
ISBN 13:
978-1-46412-526-3
Chapter 13 - Vector Geometry - 13.1 Vectors in the Plane - Preliminary Questions - Page 649: 6
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