One time I was really sure that splitting a line into three equal segments let y...

axus on Dec 16, 2024 | parent | context | favorite | on: A visual proof that a^2 – b^2 = (a + b)(a – b)

One time I was really sure that splitting a line into three equal segments let you draw lines from a point and split a 60 degree angle into three 20 degree angles, but this wasn't actually true.