Puzzles/Subdivisions/Subdividing a cornerstone

< Puzzles < Subdivisions

Can you subdivide the following outline into four identical pieces (if you consider the border to be a straight line and '|'s and '__'s to be the same length)?

 -----
|     |
|     |
|     |
|      -----
|           |
|           | 
|           |
 -----------

Alternatively you can think of the above figure to be a square of size 4 units from which the upper right corner, a square of size 1, has been discarded.

solution

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