<P> A regular heptagon , in which all sides and all angles are equal , has internal angles of 5π / 7 radians ( 128 ​ ⁄ degrees ) . Its Schläfli symbol is ( 7 ) . </P>
<P> A regular heptagon , in which all sides and all angles are equal , has internal angles of 5π / 7 radians ( 128 ​ ⁄ degrees ) . Its Schläfli symbol is ( 7 ) . </P>
size of each interior angle of a regular heptagon
size of each interior angle of a regular heptagon
5π / 7 radians ( 128 ​ ⁄ degrees )
5π / 7 radians ( 128 ​ ⁄ degrees )