nona- is the prefix meaning 9
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.
8 sides.
It has 1000 sides.
5 sides
4 sides
5 sides.
three sides
A pentagon has 5 sides.
Sides = faces. 6 of them.
a quadralateral has 4 sides
An icoshaedron has 20 sides.
a paralleogram has four sides