This model airport is totally amazing. The detail is incredible. But the takeoffs and landings are even more impressive!
Month: December 2012
Sal Khan from Khan Academy goes through several proofs of the Pythagorean theorem. What I particularly love about all of these is how geometric and visual they are. It might even be possible to do Bhaskara’s proof with a couple of squares of paper and some scissors, making it accessible to little kids with no concept of algebra.
President James Garfield’s proof using trapezoids
https://www.youtube.com/watch?v=EINpkcphsPQ
Bhaskara’s proof
https://www.youtube.com/watch?v=1ul8g55dYA4
Proof using similarity
https://www.youtube.com/watch?v=LrS5_l-gk94
Visual proof using parallelograms
https://www.youtube.com/watch?v=rcBaqkGp7CA