The Castillo de San Marcos in St. Augustine, Florida, has the shape shown.

a. What kind (s) of symmetry does the shape of the building show? 

b. Imagine the building on a three-dimensional coordinate system. Copy and complete the following statement: The lines of symmetry in part (a) are now described as _?_ of symmetry and the rotational symmetry about the center is now described as rotational symmetry about the _?_.

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