Sierpinski triangle

A Sierpinski triangle or Sierpinski triangle gasket is a fractal resulting from doing the following:
 Start with an equilateral triangle.
 Remove center part.
 Do the same for the three largest equilateral triangles left in this one.
If this is done, the first few steps will look like this:


If this is done an infinite number of times, its area will be 0.

They can also be 3D:

200px

 References 

Category:Fractals