Final answer:
In geometry and physics, the centroid or geometric center of a triangle, which is also the center of mass if the triangle has uniform density, is known as the barycenter.
Step-by-step explanation:
The centroid of a triangular solid with uniform thickness and density is also known as the barycenter. The centroid, or geometric center, of any shape is the point where the shape would balance perfectly if it were made of a uniform material. This point is also the center of mass for the object given it has a uniform density throughout. When considering special geometric bodies like a cone, for example, the center of mass has a formulaic location—specifically, for a cone, it's located on the central axis and a quarter of the way from the base to the apex.