Are isosceles triangles and equilateral triangles centrosymmetric?

Are isosceles triangles and equilateral triangles centrosymmetric?

Definition of centrosymmetric figure: in the plane, a figure rotates 180 degrees around a point and still coincides with the original figure
Equilateral triangle is a special isosceles triangle
Regular triangles must be centrosymmetric, isosceles triangles are not centrosymmetric