End of this Lengthy Chapter

Here are some terms and formulae you may wish to review at length:

• Length of a 2D vector parallel with a coordinate axis.
• Pythagorean Formula.
• Formula for 2D vector length (first version.)
• Formula for 2D vector length (second version.)
• The triangle inequality.
• Formula for 3D vector length.
• Length is always positive or zero.
• Length of the negative of a vector.

Click on a term to see where it was discussed in this chapter. Remember to click on the "Back" arrow of your browser to get back to this page. The next chapter will discuss the direction of a vector.

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