A square based pyramid.
It's a pentagonal pyramid.
It is a square based pyramid
a cone?
A pyramid.
it is a cone
It could be a pyramid shape
Since it has 12 faces, it is a dodecahedron.
cylinder: 3 faces, 2 edges, no vertex
A cone
They are the points where three (or more) planes (or faces of the shape) meet.
An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. The number of faces at a vertex ranges from 3 to 7.
All in the world a vertex is, is a corner (or where the edges meet) of any shape...not just 3d but of course it can be:)