A 9 sided nonagon is comprised of 7 triangles
A nonagon has nine sides, and a triangle has three, so altogether they have 12 sides.
6
Pentagon
6 more sides
Answer = triangle quadrilateral hexagon decagon nonagon octagon hectagon
triangle pentgon heptagon nonagon etc.
Triangle Pentagon Septagon Nonagon Etc
Triangle Quadrilateral Pentagon Hexagon Heptagon Octagon Nonagon Decagon
Some of them are: triangle, quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, decagon ..... etc
A Cut the legs off of this A and you have a triangle, which is a polygon. Triangle Heptagon Quadrilateral Pentagon Hexagon Octagon Decagon Nonagon that is all of the polygons
Triangle Quadrilateral Pentagon Hexagon Heptagon Octagon Nonagon
Triangle, quadrilateral, Pentagon, hexagon, heptagon, octagon, nonagon, decagon, undecagon, and dodecagon