Magnitude of a Vector The magnitude of a vector ||v|| is the length of that vector. (3)2=4+9 Example: ||2i|3j|| = (2) + (3) = 4+9 = 13 Question: Find ||7i - 4j||. For more information on this topic, look in your textbook at section 6.6. You might also want to look at the Vectors presentation. 17 33