<Table> <Tr> <Th colspan="2"> Regular icosagon </Th> </Tr> <Tr> <Td colspan="2"> A regular icosagon </Td> </Tr> <Tr> <Th> Type </Th> <Td> Regular polygon </Td> </Tr> <Tr> <Th> Edges and vertices </Th> <Td> 20 </Td> </Tr> <Tr> <Th> Schläfli symbol </Th> <Td> ( 20 ) , t ( 10 ) , tt ( 5 ) </Td> </Tr> <Tr> <Th> Coxeter diagram </Th> <Td> </Td> </Tr> <Tr> <Th> Symmetry group </Th> <Td> Dihedral ( D ) , order 2 × 20 </Td> </Tr> <Tr> <Th> Internal angle ( degrees ) </Th> <Td> 162 ° </Td> </Tr> <Tr> <Th> Dual polygon </Th> <Td> Self </Td> </Tr> <Tr> <Th> Properties </Th> <Td> Convex , cyclic , equilateral , isogonal , isotoxal </Td> </Tr> </Table>
<Table> <Tr> <Th colspan="2"> Regular icosagon </Th> </Tr> <Tr> <Td colspan="2"> A regular icosagon </Td> </Tr> <Tr> <Th> Type </Th> <Td> Regular polygon </Td> </Tr> <Tr> <Th> Edges and vertices </Th> <Td> 20 </Td> </Tr> <Tr> <Th> Schläfli symbol </Th> <Td> ( 20 ) , t ( 10 ) , tt ( 5 ) </Td> </Tr> <Tr> <Th> Coxeter diagram </Th> <Td> </Td> </Tr> <Tr> <Th> Symmetry group </Th> <Td> Dihedral ( D ) , order 2 × 20 </Td> </Tr> <Tr> <Th> Internal angle ( degrees ) </Th> <Td> 162 ° </Td> </Tr> <Tr> <Th> Dual polygon </Th> <Td> Self </Td> </Tr> <Tr> <Th> Properties </Th> <Td> Convex , cyclic , equilateral , isogonal , isotoxal </Td> </Tr> </Table>
what is the interior angle of a 20 sided polygon
what is the interior angle of a 20 sided polygon
162 °
162 °