Here's a fun TIL: Because the ratio of terms in the Fibonacci sequence approaches phi, and because phi is close to the ratio of km to miles, you can approximate conversion between distances with adjacent Fibonacci numbers.

So 2 km ≈ 1 mile, 3 km ≈ 2 miles, 5 km ≈ 3 miles, 8 km ≈ 5 miles, 13 km ≈ 8 miles, etc, etc

@MightyPork so many things would have to go "right" for this ever to be the least bit useful! But I love it

@MightyPork @xor luckily you can calculate it easily if you don't

@sydneyfalk right? It's so great! And also completely coincidental

@xor You should use another sequence of number if you want a good aproximation of phi. There is better sequences to get a better phi more quickly

@Naouak yes, this isn't how you'd find phi

@xor That's really cool!

@xor holy shit

@xor this is the coolest thing I've learned all year

@xor It seems to approximate better for longer distances. 2 km is 400 metres more than 1 mile, or 1/5 of the distance. Not very approximate for some uses like urban navigation.

@xor hey, be careful, it's getting less and less accurate REALLY soon

@xor That is so cool! I love it!

@xor that is cool!

@xor this is genius.

@xor now that's some math news you can use. Math thou can hath?

@xor a cubic mile is about the same volume as a sphere with a radius of 1km

@xor ...but it's getting bad very quick

@xor I'm going to make a scale model of the Parthenon that's 1 km × 1 mile big.

@xor I would've failed so many exams without this

@xor 21 km ≈ 13 mi is especially useful for a runner :-)

@xor Here's a nice TIL: there's 1.69 kilometers in a mile.

Piggo@MightyPork@dev.glitch.social@xor that's great, ... if you remember the Fibonacci sequence