I'm sorry,but your answer doesn't make any sense so no one can answer it :)
there are 15 triangles in a 17 sided polygon
There are 17 triangles in a 19 sided polygon
It has 58 triangles
It has 23 triangles
It has 34 triangles
It can have 5 triangles
A 30 sided polygon contains 28 triangles.
There are 3 triangles inside a 5 sided pentagon polygon
There are 6 triangles
7000 triangles
There are 33 triangles in a 35 sided polygon.
There are 11 triangles in an undecagon. The number of sides of a polygon is the number of triangles it has.