Sierpiński Triangle — Triangles repeat inside triangles at every scale.
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Fractals & infinity / 1915

Sierpiński Triangle

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Triangles repeat inside triangles at every scale.

TRY THIS

Count the three large copies, then find three smaller copies inside one of them.

FOLLOW THE SOURCES

History, evidence & image credit

THE IMAGE IN THIS ARCHIVE

Marco Polo (original); Perhelion (current SVG revision)

Original file & attribution · CC BY-SA 3.0

Original image downloaded from Wikimedia Commons; the downloaded file is unchanged. Gallery previews may be resized or converted to WebP; animated previews show the first frame.

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Frequently asked questions

What is Sierpiński Triangle?

Triangles repeat inside triangles at every scale.

What should I look for in Sierpiński Triangle?

Count the three large copies, then find three smaller copies inside one of them.

What explains Sierpiński Triangle?

Start with a filled triangle. Divide it into four equal triangles and remove the middle one; repeat in each remaining triangle. Three half-size copies reproduce the full set.

Sierpiński Triangle — Triangles repeat inside triangles at every scale.

Sierpiński Triangle