what is rotational symmetry

That is a great answer devanshbabla1!

I sent you a private message - you may get a pop up notification, I am not sure.  Maybe you can let me know.

The video is also good for this question.

https://www.youtube.com/watch?v=qlWXuT4R3oI

Generally speaking, an object with rotational symmetry, also known in biological contexts as radial symmetry, is an object that looks the same after a certain amount of rotation.

turn it 72 degrees and it will look the same.