What is a nonagram? A nine pointed star, perhaps. In any case, a general nonagram, like a general (ie non regular) polygram(!) has NO lines of symmetry.
a regular pentagon has five sides. The word regular means equal
A regular or an irregular dodecagon both have 12 sides
A regular decagon has 10 equal sides.
7 sides
What is a nonagram? A nine pointed star, perhaps. In any case, a general nonagram, like a general (ie non regular) polygram(!) has NO lines of symmetry.
nona- is the prefix meaning 9
A regular octagon has 8 sides.
a regular pentagon has five sides. The word regular means equal
A regular heptagon has seven sides.
A regular heptagon has no parallel sides.
It can have 3, 4 or 6 sides.
A regular or an irregular dodecagon both have 12 sides
A regular decagon has 10 equal sides.
a regular or scalene triangle has no equal sides
it has twelve sides
9 sides