Scaling Principles

 Principle 1: LengthIf x and y are length dimensions on geometrically similar figures, then y is proportional to x, then
 

Principle 2: Area
If x is a length and A is an area on geometrically similar figures, then

Principle 3: Volume

If x is a length and V is a volume on geometrically similar figures then

Example:

xin/9.4in=273cm/100cm = 25.662 in shadow * 2.54*10 = 652 mm (2.54 cm in 1 inch)  

Kevin Valle :D