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- 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:
- "Cynthia Lanius' Fractals Unit: The Sierpinski Triangle". Math.rice.edu. http://math.rice.edu/~lanius/fractals/. Retrieved 2011-10-28.