There is no limit to the number of sides that a particular shape can have. The Icosahedron has 20 sides. It would tend to the circle as the number tends to infinity: even a 360-sided polygon (1 degree internal angles) would look a bit like like a pixellated circle.
It is an 8 sided octagon
A decagon has 10 sides and so 2*10 = 20
a shape with ten sides
Well, honey, a shape with 20 sides is called an icosagon. It's like a polygon on steroids, with all those sides flaunting their angles like they're on a runway. So next time you need to impress someone with your geometry knowledge, just drop the word "icosagon" and watch them swoon.
A 20-sided shape is called a dodecahedron.
It's a shape with 20 sides
A icosahedron.
Icosahedron
To get the perimeter you have to add all the sides in the shape. For example 20+20+20+20 because a square has 4 sides. So the answer for this most be equals to 80ft long.
At last count it was exactly 20!
icosahedron (solid shape) icosagon (2 dimensional) See related link.
20 sides
There is no limit to the number of sides that a particular shape can have. The Icosahedron has 20 sides. It would tend to the circle as the number tends to infinity: even a 360-sided polygon (1 degree internal angles) would look a bit like like a pixellated circle.
A polygon with 20 sides is called either a 20-gon or an icosagon.
It is an 8 sided octagon
A decagon has 10 sides and so 2*10 = 20