Question

Which of these letters have rotational symmetry?
M L A T X H S

Answer 1

X, H, and S would each have two orders (though X could have 4, depending upon the font)
http://www.mathsisfun.com/geometry/symmetry-rotational.html

Answer 2

Mrs-Hate-Bieber, please keep math questions in the math study group. Thanks!

Answer 3

x, h,a