The Pythagoras tree is a plane fractalPythagoras because each triple of touching squares encloses a right triangle, in a configuration traditionally used to depict the Pythagorean theorem. constructed from squares. It is named after
If the largest square has a size of 1×1, the entire Pythagoras tree fits snugly inside a box of size 6×4. The finer details of the tree resemble the Lévy C curve.
Construction
The construction of the Pythagoras tree begins with a square. Upon this square are constructed two squares, each scaled down by a linear factor of ½√2, such that the corners of the squares coincide pairwise. The same procedure is then applied recursively to the two smaller squares, ad infinitum. The illustration below shows the first few iterations in the construction process.
 |  |  |  |
| Order 0 | Order 1 | Order 2 | Order 3 |
Area
Iteration n in the construction adds 2n squares of size (½√2)n, for a total area of 1. Thus the area of the tree might seem to grow without bound in the limit n→∞. However, some of the squares overlap starting at the order 5 iteration, and the tree actually has a finite area because it fits inside a 6×4 box.
It can be shown easily that the area A of the Pythagoras tree must be in the range 5 < A <>A.
Uses
It is possible that the Pythagoras tree would make very useful fractal antennas with only minor tweaking. This assumption is based on its very high Hausdorff dimension
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