<P> These symmetries express 9 distinct symmetries of a regular hexagon . John Conway labels these by a letter and group order . r12 is full symmetry , and a1 is no symmetry . d6 , a isogonal hexagon constructed by four mirrors can alternate long and short edges , and p6 , an isotoxal hexagon constructed with equal edge lengths , but vertices alternating two different internal angles . These two forms are duals of each other and have half the symmetry order of the regular hexagon . The i4 forms are regular hexagons flattened or stretched along one symmetry direction . It can be seen as an elongated rhombus , while d2 and p2 can be seen as horizontally and vertically elongated kites . g2 hexagons , with opposite sides parallel are also called hexagonal parallelogons . </P>
<P> These symmetries express 9 distinct symmetries of a regular hexagon . John Conway labels these by a letter and group order . r12 is full symmetry , and a1 is no symmetry . d6 , a isogonal hexagon constructed by four mirrors can alternate long and short edges , and p6 , an isotoxal hexagon constructed with equal edge lengths , but vertices alternating two different internal angles . These two forms are duals of each other and have half the symmetry order of the regular hexagon . The i4 forms are regular hexagons flattened or stretched along one symmetry direction . It can be seen as an elongated rhombus , while d2 and p2 can be seen as horizontally and vertically elongated kites . g2 hexagons , with opposite sides parallel are also called hexagonal parallelogons . </P>
how many lines of symmetry does a hexagon has
how many lines of symmetry does a hexagon has
9
9