<Tr> <Th> Schläfli symbol </Th> <Td> (16), t (8), tt (4) </Td> </Tr> <Tr> <Th> Coxeter diagram </Th> <Td> </Td> </Tr> <Tr> <Th> Symmetry group </Th> <Td> Dihedral (D), order 2 × 16 </Td> </Tr> <Tr> <Th> Internal angle (degrees) </Th> <Td> 157.5 ° </Td> </Tr>

How many lines of symmetry does a regular polygon with 16 sides have