Which of the following is NOT a type of projection in geometry?

In geometry, various types of projections are used to represent three-dimensional objects on a two-dimensional plane. The common projections include front elevation, plan, and side elevation.

Front elevation shows the object as viewed from the front, allowing for a clear representation of vertical features. The plan view, on the other hand, depicts the object from above, providing insight into the object's layout and dimensions horizontally. Side elevation offers a profile of the object from the side, representing how the object appears from that angle.

The term "bottom view" is not commonly associated with projections in standard geometrical practices. While it may sometimes be informally used to describe a view from below, it does not fit into the conventional types of projections such as front or side elevations, or plan views. Therefore, it can be classified as not being a recognized type of projection in geometry.