### Home > A2C > Chapter 10 > Lesson 10.2.6 > Problem 10-152

10-152.

Imagine a circle with a radius of 4 units and a center at *x*-axis, always staying the same distance from the axis. It sweeps out a three-dimensional figure. What shape is formed? Make a sketch.

It makes a torus (a doughnut).

Remember to make a sketch.