12-sided two dimensional shape: dodecagon12-sided three dimensional shape: dodecahedron
A five-sided 2-dimensional shape is a pentagon.
There isnt one
An 8 sided shape is an octagon
A decagon is the ten-sided polygon (two dimensional shape). A decahedron is a ten-sided thee-dimensional shape. A ten-sided die can also be called a pentagonal trapezohedron.
12-sided two dimensional shape: dodecagon12-sided three dimensional shape: dodecahedron
An octagon is an 8 sided 2 dimensional shape. A cylinder with the base of a hexagon (6 sided shape) would be an 8 sided 3 dimensional shape.
A 5-sided 2-dimensional figure is a pentagon and a 5-sided 3-dimensional shape is a pentahedron.
A plane figure (a 2-dimensional shape) with six sides is a hexagon. A solid figure (a 3-dimensional shape) with six sides is usually a cuboid
A five-sided 2-dimensional shape is a pentagon.
A hexahedron is a three-dimensional geometric shape having six sides; a hexagon is a two-dimensional six-sided shape.
A two dimensional 10 sided shape is a decagon.
An 18 sided shape is called a octadecagon. This refers to both 2 dimensional and 3 dimensional shapes in a mathematical sense.
There is no such thing as a 1 sided shape nor a two sided shape.
There isnt one
In geometry a 29 sided shape is referred to as an icosikaidigon. The shape closely resembles an 3 dimensional octagon.
The interior is a two-dimensional, 7-sided area.