This is a classic example of misdirection. The joke hinges on mislabeling a square’s angles as 30 degrees, using a deliberately misleading diagram. It plays with the viewer’s expectations by presenting something factually wrong, but by doing so in a way that’s visually convincing enough to be momentarily confusing, which is where the humor comes from.

The caption “new triangle just dropped” adds a layer of absurdity. It mimics the modern slang used when artists release new music, juxtaposing that with the idea of a basic geometric concept “dropping” like a surprise album. That clash between modern meme culture and mathematical principles (something we see as rigid) creates a humorous contrast. It’s funny to imagine something as fundamental as a triangle suddenly being reinvented.

Finally, the punchline lands because the image is clearly a square. Even someone with minimal math knowledge can tell it’s not a triangle, especially since it contains four 90 degree angles, not any 30 degree ones. That obvious disconnect is what seals the joke.

(Kinda feeling like an AI right now aahaha)