That's called a Decagon.
octagonal prism
It is a decahedron.
A figure that has 6 rectangular faces is called a rectangular prism .
A polyhedron with 20 faces is called an icosahedron.
That's called a Decagon.
octagonal prism
A decaredra is the ten face solid figure.
It is a decahedron.
An octagonal prism.
A solid figure with twenty faces is called an Icosahedron.
A polyhedron with 20 faces is called an icosahedron.
A figure that has 6 rectangular faces is called a rectangular prism .
A ten sided figure is called a Decagon. ( i think that's how you spell it. )
A polyhedron with 20 faces is called an icosahedron.
A three-dimensional figure with 30 faces is called a triacontahedron.
A three dimensional figure with polygonal faces is called a polyhedron. Specific names draw from the Latin prefixes. For example a four sided figure is a tetrahedron.