Pythagorean Triple Day! @MathVisualProofs

Uploaded September 2025 | Updated September 2026, 2 weeks ago

Tuesday, September 16, 2025 (9/16/25) is a fascinating numerical day because 9., 16, and 25 are all perfect squares and even more interesting, 9+16=25. This means 25 is a sum of two squares and since it is itself a square there is a right triangle with side lengths 3,4,5 - this is the most famous Pythagorean triple. Hope you enjoy Pythagorean triple day!

Ulam Spiral (primes in a 450 x 450 grid)!

$Lévy C: Copy; Rotate 90; shift new start to old end Lévy C: Copy; Rotate 90; shift new start to old end In this video, we show how to generate a fractal curve known as the Lévy C curve or Lévy Dragon by repeatedly copying, rotating and shifting, starting with a line segment. What happens if you do something similar with different rotations or different shifts? If you like this video, consider subscribing to the channel or consider buying me a coffee: https://www.buymeacoffee.com/VisualProofs. Thanks! Check out these videos for related constructions: https://youtu.be/rLxx6b-oJGo https://youtu.be/NBI_5GdvqUo This animation was inspired by an article written by Larry Riddle that appeared in the the November 2016 issue of Math Horizons: https://doi.org/10.4169/mathhorizons.24.2.18 See more here (https://larryriddle.agnesscott.org/symmetricfractals.pdf) and on his website: https://larryriddle.agnesscott.org/ifs/levy/levy.htm #levy #levydragon #math #manim #animation #fractals To learn more about animating with manim, check out: https://manim.community$

Continuous everywhere but differentiable nowhere : Weierstrass Function Visualization!

Infinite Sum of Powers of 1/3 in Equilateral Triangle

Lunes off a Right Triangle (visual proof)