Sal Khan
A broad set of tutorials covering perimeter area and volume with and without algebra. Named after Helge von Koch, the Kock snowflake is one of the first fractals to be discovered. It is created by adding smaller and smaller equilateral bumps to an existin. Source: Khan Academy (www.khanacademy.org), used under the Creative Commons Attribution-NonCommercial-ShareAlike (CC BY-NC-SA) license. All Khan Academy content is available for free at www.khanacademy.org. Khan Academy does not endorse the World Public Library.
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