cone
A cone has one vertex, one edge, and one base.
A 3D shape with one vertex is called a cone. It has a circular base and a single apex (the vertex) where all the lines from the base converge. The shape tapers smoothly from the base to the vertex, creating a pointed top. Other examples of shapes with one vertex include certain types of pyramids, but cones are the most common reference for this characteristic.
The 3-D shape with one edge, two faces, and one vertex is a cone. It has a circular base (one face) and a curved surface that tapers to a point (the vertex). The edge is the circular boundary of the base.
When a square pyramid is sliced perpendicular to its base through a vertex, the cross section will be a triangle. This triangle will have one vertex at the apex of the pyramid and the other two vertices on the base, forming a triangular shape that includes one of the pyramid's edges and a segment of the base. The resulting triangle will be isosceles if the slice is made symmetrically.
A cone.
The 3D shape with one face and one vertex is a cone. A cone has a circular base that serves as its singular face, while the point at the top where all the lines from the base converge is the vertex. It can also be considered an apex, where the shape tapers to a single point.
A cross section of a rectangular pyramid through its vertex and perpendicular to its base creates a triangular shape. This triangle's base corresponds to one of the edges of the rectangular base, while its apex is at the vertex of the pyramid. The height of the triangle is determined by the vertical distance from the vertex to the base.
A cone has one vertex, which is the pointed tip of the shape. The base of the cone, which is typically circular, does not count as a vertex. Therefore, in total, a cone has one vertex.
The solid shape you are describing is called a cone. A cone has a circular base and narrows to a single vertex, or apex, at the top. Its curved surface connects the base to the vertex, distinguishing it from other solid shapes.
A right truncated cone.
It's a pentagonal pyramid.
A right cylindrical cone has a circle for a base and one vertex. a diagram is shown on unitmath.com