2011

October 6

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Steve Jobs 1955-2011

“Death is very likely the single best invention of Life. It is Life’s change agent. It clears out the old to make way for the new.” - Steve Jobs, in his 2005 Stanford Commencement Address

Original

posted @ 08:27 AM EDT

October 22

Visual Proof of the Pythagorean Theorem

Because it is so simple and visually obvious, this is my favorite proof of the Pythagorean Theorem: for any right triangle, the square of the hypoteneuse is equal to the sum of the squares of the other two sides.

The large square on the left contains four congruent right triangles, leaving a white square in the middle having the area of the square of the hypoteneuse of the triangles. The large square on the right contains the same right triangles, leaving two white squares, each having the area of the square of one of the other two sides of the triangles.

posted @ 12:42 PM EDT