18.
I'm assuming that you need to know the number of triangles so you can find the sum of the interior angles (since each triangle has 180˚, all you have to do is multiply). If I'm correct in my assumption about your reason, then just remember that you'll always subtract 2 from the number of sides before multiplying by 180.
A nine sided shape has 7 triangles
There are 9 triangles in an 11 sided shape
1o triangles
A dodecagon is a 12 sided shape made from 10 triangles
how many triangles are in a eight sided figure
A nine sided shape has 7 triangles
1o triangles
There are 9 triangles in an 11 sided shape
#
A dodecagon is a 12 sided shape made from 10 triangles
Originating from one vertex there are 27 triangles
11
how many triangles are in a eight sided figure
8
the shape that can make two smaller triangles is parallelogram.
congruent triangles
The closest thing to a triangle shape in a soccer field are the corner field marks and they are not technically triangles. The answer is zero.