10-2 = 8 triangles
6-2 = 4 triangles
8-2 = 6 triangles
9-2 = 7 triangles
n - 2 triangles
A 6 sided prism
2 triangles are in a triangular prism
10-2 = 8 triangles
There are: 13-2 = 11 triangles
There are: 23-2 = 21 triangles
There are 67-2 = 65 triangles
6-2 = 4 triangles
8-2 = 6 triangles
9-2 = 7 triangles
There are: 100-2 = 98 triangles
2 triangles and 3 rectangles(:
n - 2 triangles