158957

How many pentagons form a ring?
The answer is ten, to form a ring with pentagons you need 10 pentagons.
How many decagons would form a ring?
The answer is 5, you need 5 decagons to form a ring with decagons.
Why do they fit together so neatly without overlapping or leaving a gap?
This because they have the same amount of sides.
What about other polygons?
I feel like every time it is gonna be ten of whatever polygon to form a ring. I think this because every time I have tried
Can you always make a ring?
Yes you can. You can always.
Is there a way to predict how many polygons you need to form a ring?
No I don't think so. But it might be that it is always a factor of 5.