Yes and it will have 25 sides
It has 25 sides.
The formula for the sum of the interior angles of a polygon is: 180 * (n - 2) where n is the number of sides of the polygon. So the sum of the angles of a polygon with 25 sides is 180 * 23 = 4,140.
ICOSITEPENTAGON
A circle could be considered to have "no sides" in theory, however under this definition it is not a polygon. Also, a circle could be considered to have infinite sides. You could consider a point to be a no-sided polygon, but it's a stretch.
Above a certain number of sides, a polygon is simply called an n-gon, with the letter "n" representing the number of sides. So, in your case, a 25-gon.
It will have 25 sides
Yes. A polygon could have any number of sides.
I would call it a 25-gon since that communicates the relevant information effortlessly. However, you could also call it an icosipentagon.
None. Since the number of sides is odd, there can be no parallel sides.
It could be an irregular polygon with different sides or a regular polygon with equal sdes
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