FREE - The Pythagorean spiral project uses the Pythagorean Theorem to create a beautiful spiral if done correctly. This can be used from Pre-Algebra all .

Excellent video Geometry, Fibonacci numbers and biology

What do hurricanes, galaxies, sunflowers and the human ear have in common? They all have inherent spiral shapes that conform almost perfectly to the ‘golden spiral’, which is derived from a mathematic formula.

Even the human ear conforms to the shape of the golden spiral. This shape helps collect sound waves and direct them to the inner ear by kristy