Peaucellier
- Author:
- John Golden
Euclid said, all you need are straight lines and circles.
But where do we get a straight line?
Use a ruler.
But how does the ruler get straight?
Fun story about this at the Futility Closet: http://www.futilitycloset.com/2014/12/05/straight-and-narrow-3/
More GeoGebra at bit.ly/mh-ggb