Rectangle, F=1, A is the length of the bottom edge, B is high.....So, S1S2, S3,..., one by one.The sum of the above Si is the total area. The amount of template engineering is required.
Si=F*A*B, formula, F coefficient, A, length, B width or height.Such as triangle F=0.5, A for the bottom edge of the length, B is high.
The template to be installed to expand into one piece, each piece of the area is
