Because it is a polyhedron meaning many faces whereas a polygon means many sides.
Triangular Pyramid.
Yes
It has less than three sides.
triangular pyramid
A 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
Yes
A triangle forms the cross-section of a triangular prism.
triangular prism
It has less than three sides.
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.