A icosahedron.
A 20-sided polyhedron is an icosahedron. A 20-sided polygon is an icosagon.
A polygon with 20 sides is called either a 20-gon or an icosagon.
A polygon with 20 sides is an icosagon.
It has 360/20 = 18 sides
dodecahedron
A 20-sided shape is called a dodecahedron.
A 20-sided polyhedron is an icosahedron. A 20-sided polygon is an icosagon.
A polygon with 20 sides is called either a 20-gon or an icosagon.
A shape with 13-20 sides may be called a polygon - but only if all the sides are straight lines - and there is nothing in the question to suggest that they are.
A polygon with 20 sides is an icosagon.
It has 360/20 = 18 sides
There is no such figure as a 20 degrees polygon.
There is a corresponding side to every angle. 20... A polygon has as many sides as it does angles.
icosagon
Icosagon
dodecahedron
There is no such polygon but if you meant exterior angles of 20 degrees then it will have 360/20 = 18 sides