Pentagon , 5 sided shape with 5 vertices Hendecagon , 12 sides and 12 vertices
It is a 5 sided pentagon
pentagon
A polygon with 5 sides/vertices is called a pentagon.
A pentagon is a two dimensional polygon. As such it has no faces, because a face is a flat surface and two dimensional objects have no surface. It does have five edges and five vertices.
A pentagon has five sides and five vertices
There is no such shape.
Pentagon
5
Yes. Two triangle touching corner-to-corner. There would be six sides, but only 5 vertices because one vertex is shared.
Pentagon , 5 sided shape with 5 vertices Hendecagon , 12 sides and 12 vertices
A right square based pyramid.
It is a 5 sided pentagon
Not a polyhedral shape. You need at least three vertices to define a plane shape. With 5 vertices, the maximum number of triplets you can get is 10 so there cannot be 11 faces.
1 + number of sides/vertices the base shape has A square-based pyramid has 5 vertices, for example.
A quadrilateral based pyramid.
A pentagonal pyramid (5 sides and 1 base) has 6 faces, 6 vertices, and 10 edges (5 between the sides and 5 with the base).