Fractal Federation Façade.

A mathematical landmark in the heart of Melbourne.

Listen above, or to delve more deeply, read this:

http://www.springerlink.com/content/k11885r713151508/fulltext.pdf

Hexaflexagons will blow your mind, man. Also, fantastically narrated.

(Source: http://www.youtube.com/)

This is an old trick for finding the centre of a circle (this particular example being drawn from a Russian book, published in 1986).

How does it work? It’s based on Thales’ Theorem, which states that if points A and C (below) are the ends of a diameter, then joining them to a third point on the circle, B, will always form a right angled triangle, no matter where B lies.

This gallery contains 1 photo.

The formula 1+2+3+…+n = k

^{2}holds for only certain values of n and k.The first solution n=1 k=1 is trivial.

The next solution is n=8 k=6. The following pictures show polyominoes of length 1-8 tiled inside a 6 x 6 square, one with L polyominoes, and the other with W polyominoes:

For more information on the fascinating world of polyominoes, see:

http://mathworld.wolfram.com/Polyomino.html

And don’t even get me started on the r-pentomino from Conway’s Game of Life.

This gallery contains 1 photo.

http://www.tumblr.com/audio_file/adenozine/1400538140/tumblr_latl89ZoS21qesk11?plead=please-dont-download-this-or-our-lawyers-wont-let-us-host-audio

Fractal Federation Façade.

A mathematical landmark in the heart of Melbourne.

Listen above, or to delve more deeply, read this:

http://www.springerlink.com/content/k11885r713151508/fulltext.pdf