American Association of Physics Teachers
Com Padre Digital Library: Open Source Physics: Vector Addition Model
This Java applet simulation explores vector addition of two vectors in two dimensions. Given the magnitude and direction, students must determine the vector components.
Wolfram Research
Wolfram Math World: Math World: Vector Sum
Defines vector sum and expresses the notation using algebra. Includes links to sites with related information.
CK-12 Foundation
Ck 12: Vector Addition
[Free Registration/Login may be required to access all resource tools.] Here you'll learn how to add two vectors with either the triangle method or the parallelogram method.
CK-12 Foundation
Ck 12: Vector Sum and Difference
[Free Registration/Login may be required to access all resource tools.] Looks at finding the direction and magnitude of vectors and breaking vectors into component parts.
Physics Classroom
The Physics Classroom: Vectors and Projectiles: Vector Addition: 6 + 8 = ?
Become a student of physics and approach the task of adding vector quantities, which also include direction. See this head-to-tail animation which helps with the visualization of this concept.
National Council of Teachers of Mathematics
The Math Forum: Vector Addition: Algebra
Illustration and description of how to add vectors using algebra.
Wolfram Research
Wolfram Math World: Math World: Vector Addition
Defines vector addition and gives the algebraic notation for adding vectors. Includes a graphic and links to additional information.