For a figure that has rotational symmetry, the number of times the figure looks the same when rotated by an angle less than or equal to $360^{\circ },$ is called the order of symmetry. Consider the examples in the applet. A square has rotational symmetry of order $4.$ An equilateral triangle has rotational symmetry of order $3,$ and the digit $0$ has an order of symmetry of 2.