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First day of fifth grade (cdn.imgchest.com)
submitted 1 day ago* (last edited 1 day ago) by Samdell@lemmy.eco.br to c/greentext@sh.itjust.works
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[-] NateNate60@lemmy.world 115 points 1 day ago

Important distinction: A triangle is a three-sided polygon. For example, a quarter-circle is not a triangle, despite being a three-sided shape.

[-] Reddfugee42@lemmy.world 7 points 1 day ago

They should have included something about the count of angles in the name

[-] elevenbones@sh.itjust.works 12 points 1 day ago

A quarter circle still has three angles. I am pretty sure about this. Now that I think of it, I think it has three 90° angles, which is kinda sus.

[-] Reddfugee42@lemmy.world 1 points 1 day ago

The curved part has infinite angles

[-] lunarul@lemmy.world 13 points 1 day ago

If you want to go that way, the straight parts have infinite angles too.

[-] ddplf@szmer.info -4 points 1 day ago
[-] lunarul@lemmy.world 8 points 1 day ago

They're just arcs from an infinite radius circle.

[-] ddplf@szmer.info 2 points 1 day ago

Is it even mathematically legal to allow impossible shapes into this type of dilemma?

[-] elevenbones@sh.itjust.works 5 points 1 day ago

believe it or not, straight to math jail

[-] Reddfugee42@lemmy.world 1 points 23 hours ago
[-] wax@feddit.nu 2 points 1 day ago

In 5D conformal geometric algebra G (4,1), a sphere can contain a point at infinity, and therefore represents a flat plane.

[-] lostme@lemmy.world 5 points 1 day ago

Those angles are just 180° (:

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this post was submitted on 09 Jun 2025
286 points (97.4% liked)

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