Yes
Triangular Pyramid.
triangular pyramid
A pyramid.
A polyhedron with a polygon base and triangular sides that all meet at a common vertex is known as a pyramid. The base can be any polygon, such as a triangle, square, or pentagon, and the triangular sides are called lateral faces. The vertex where all the triangular faces converge is referred to as the apex of the pyramid. Each type of pyramid is named based on the shape of its base, such as a triangular pyramid or a square pyramid.
Pyramid
A cylinder is a polygon that has circles as its base. A triangular pyramid is a polygon that has a triangle as its base.
no A polygon is a 2-dimensional object, while a triangular prism is a 3-dimensional object.
Triangular Pyramid.
Yield signs are triangular, but have rounded corners. An actual triangular shape, if equilateral, would be a regular polygon.
triangular polygon
A triangle forms the cross-section of a triangular prism.
triangular prism
triangular pyramid
A pyramid.
In a 54-sided polygon, 53 possible diagonals can be drawn from one vertex to another. These diagonals will not intersect. Therefore, the interior will be divided into 54 regions by the 53 diagonals plus the two sides of the original polygon that adjoin the vertex from which the diagonals are drawn.
A triangular based pyramid would seem to fit the given description
All but one face must be triangular. The base can be any polygon, including a triangle.