Curiously enough, the cubes don’t move, only the background color changes…
Here is our tutorial to create an amazing autokinetic animation.
Original Proof of the Pythagorean Theorem
Clever visual proof by Mike Hirschhorn.
Repunit Primes
Write the digit “1” exactly 317 times, and you get a palindromic prime number. Moreover, 317 itself is a prime number!
Visual Proof (sum of cubes)
The sum of the sequence of the first n cubes equals [n(n+1)/2]² as shown below:
1³+2³+3³+…+n³ = (1+2+3+…+n)² = [n(n+1)/2]²
Topology & Ethology
The ways ravens carry two donuts at once! Read more.
