Cutting a rectangle and recieving a square How can I cut a $1 \times 10$ rectangle $7$ times so that I can receive a square?
 I have tried doing it, but wasted lots of paper. 

The solution in the linked image uses 4 cuts. None of the pieces needs to be rotated.
It is generated using a dissection based on a strip: imagine layering the long, thin rectangle across the square and cutting at the edges of the square.
Rectangle to square
If exactly 7 cuts are needed, the extra cuts can be added arbitrarily.
