That would be an inverted cone...
A pentagon
y78t6
Shapes with no names are typically referred to as "irregular shapes." These shapes do not have specific labels such as circle, square, or triangle, as they do not conform to any standard geometric definition. Irregular shapes can have varying sides, angles, and measurements, making them unique and not easily categorized.
Each side is called a face.
The name of an eleven sided geometric shape is a Hendecagon or endecagon.
Its the name for a shape
sphere
A heptagon.
There is no name but a cylinder is the nearest standard geometric shape.
I believe it is Rhombus
That would be an inverted cone...
metallic
rectangle
Fractal,
An ellipse? The shape described is not an exactly describable geometric shape, (), and as far as I know there is no name for it.
A pentagon