a heart have no rotational symmetry!
It has rotational symmetry to the order of 2
A regular nonagon with 9 sides has a rotational symmetry of 9.
Irrotational,rotational,solenoidal vecter field
Rotational symmetry of order 1.
A kite does not have rotational symmetry.
No. But it does have rotational symmetry of order 2.
Yes, of order 2.
It has rotational symmetry of order greater than 2.
Uh.. here is a sentence... Note there is rotational symmetry in this pattern around the line joining these elements. Hope this helps. Sorry if it's too late.
180 degrees
1
4
Yes
Three
Order 4.
It would help if you checked your spelling before posting the question. I can guess that "symmerty" is meant to be symmetry but I have no idea what a hepaton is. Sorry.