Triangular Pyramid.
triangular pyramid
A pyramid.
3
A geometric figure with a polygonal base and triangular sides is called 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
A triangle forms the cross-section of a triangular prism.
triangular prism
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.
triangular pyramid
A pyramid.
All but one face must be triangular. The base can be any polygon, including a triangle.
A triangular based pyramid would seem to fit the given description