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{{ printedBook.courseTrack.name }} {{ printedBook.name }} We have been given a diagram with a five pointed star. The lines drawn to its center divides the full rotation in five congruent angles. Knowing that a full rotation is $360_{∘}$ we find that each angle has the measure $5360 =72_{∘}.$

By rotating the star $72_{∘}$ about its center will maps the star onto itself.

The same is true if we rotate the figure $144_{∘}$ about the center.