this is the math part where I folded a piece of paper in half 4 times and recorded it on a table:

Folds 1 2 3 4
# of triangles 2 4 8 16

if I fold it again I get 32 triangles

Folds 5 6 7 8
# of triangles 32 64 128 256

The # of triangles doubles every time because you cut each triangle in half every time