Khan Academy
Khan Academy: Vector Addition & Magnitude: Magnitude of Vector Sums
Explains some interesting properties of the magnitude of vector sums. [5:30]
Sophia Learning
Sophia: Adding Vectors Using the Parallelogram Rule: Lesson 2
This lesson demonstrates how to add vectors using the parallelogram rule. It is 2 of 2 in the series titled "Adding Vectors Using the Parallelogram Rule." [9:01]
Sophia Learning
Sophia: Vector Addition: Lesson 5
This lesson introduces addition operations in vectors. It is 5 of 6 in the series titled "Vector Addition." [1:45]
Sophia Learning
Sophia: Vector Addition
This lesson introduces addition operations in vectors. [3:11]