# Trial Animation

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This is just a first attempt at an animation made with SketchUp and Gimp.

It represents rotating the region enclosed by and around the *y*-axis.
The steps represented are

- Presenting the region;
- Superimposing horizontal rectangles;
- Revolving a single rectangle to produce a washer;
- Revolving the remaining rectangles to produce a volume approximation with washers;
- Realizing the final volume as a limit.