It depends on the length of the sides, if they are all equal in length, then yes. If not, then the probability of it having rotational symmertry is as likely as not.
Yes, a regular pentagon has rotational symmetry.
No - a pentagon has 120 degree rotational symmetry.
Yes
Yes.
They have not got any rotational symmetry
5
It has both because it has 5 lines of symmetry and rotational symmetry to the order of 5
If it is a regular 5 sided pentagon then its order of rotational symmetry is 5
it is order 5
a pentagon has rotational symmetry if its a regular pentagon. if you add all 5 sides together you will get 360 degrees
A pentagon has roatotional symmetry only if it is a regulat pentagaon. In that case, it has a rotational symmetry of 360/5 degrees and its multiples. That is, 72, 144, 216, and 288 degrees.
This is a little bit like asking why a square has four sides. A regular pentagon is defined in such a way as to require that it has 5-fold rotational symmetry.