# Chapter 12 - Section 12.1 - Three-Dimensional Coordinate Systems - 12.1 Exercises - Page 797: 32

A cylinder with its center along the z-axis and radius 2.

#### Work Step by Step

In two-space, $x^2+y^2 = r^2$ is a circle with radius $r$. In three-space, we must account for all z-values. This creates a cylinder that extends along the z-axis.

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