Math Memes

1499 readers

8 users here now

Memes related to mathematics.

Rules:
1: Memes must be related to mathematics in some way.
2: No bigotry of any kind.

founded 1 year ago

MODERATORS

[email protected]

305

You don't have to use gyroelongation (lemmy.ml)

submitted 6 months ago by [email protected] to c/[email protected]

7 comments fedilink hide all child comments

image description

Standard "they don't know" meme format, featuring line art of "That Feel Guy" wearing a party hat standing in a corner while other people are dancing. An image of an icosahedron formed by three mutually perpendicular golden ratio rectangles sits in front of That Feel Guy. The caption text says "They don't know that three mutually perpendicular golden ratio rectangles, with edges connecting their corners, form a regular icosahedron."

https://en.wikipedia.org/w/index.php?title=Regular_icosahedron&oldid=1219666251#Construction

top 7 comments

sorted by: hot top controversial new old

[–] [email protected] 30 points 6 months ago (1 children)

Oh shit this just upgraded my CAD game

[–] [email protected] 5 points 6 months ago* (last edited 6 months ago) (1 children)

Is it possible to create a golden ratio rectangle in CAD using "ruler and compass" techniques, or is numerical approximation necessary?

[–] [email protected] 8 points 6 months ago (1 children)

I don't do CAD, but can it be done with "ruler and compass"?
Yes, as the golden ratio is (1+sqrt(5))/2 and sqrt(5) can be found in a right angled triangle with side length 1,2 and sqrt(5).

With some effort the root of any natural number can be constructed with ruler and compass by creating a spiral of right angled triangles.

[–] [email protected] 4 points 6 months ago

The lengths you can construct are exactly the numbers which are composed of 1, addition, subtraction, multiplication, division, and square roots

[–] [email protected] 14 points 6 months ago (1 children)

When you roll a natural 1 on your charisma check

[–] [email protected] 4 points 6 months ago

Bob?

[–] [email protected] 3 points 6 months ago

I love icospheres. Better than UV spheres.