The correct answer to the question "What's up?"

In 3-dimensional Cartesian terms, the x-axis is east and west, the y-axis is north and south, and the z-axis is up and down. So the positive z-axis is what's up.

In 3-dimensional Cartesian terms, the x-axis is east and west, the y-axis is north and south, and the z-axis is up and down. So the positive z-axis is what's up.

by MarshoT November 30, 2009