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[-] deegeese@sopuli.xyz 143 points 8 months ago

It’s better known by its stage name, diamond.

[-] Sludgeyy@lemmy.world 27 points 8 months ago

A square is a rectangle, but a rectangle isn't necessarily a square

Same with rhombus and diamond

A rhombus is a diamond, but a diamond isn't necessarily a rhombus

Rhombus has to have four equal sides, a diamond does not.

[-] hydrospanner@lemmy.world 12 points 8 months ago

I think most people would say a 2D shape that they'd call a diamond would have 4 equal sides.

I don't think very many at all would call an elongated parallelogram a "diamond".

[-] Sludgeyy@lemmy.world 4 points 8 months ago

If I took a traditional diamond shape and elongated just the bottom sides.

I feel like most would call it a diamond still. Specific term would be a kite. Many wouldn't come up with that, though. It's not an elongated parallelogram. It is not a rhombus.

"Diamonds" on bicycle playing cards have curved edges. They are not a rhombus because sides are not parallel. Most agree that it's the classic diamond shape, though.

[-] hydrospanner@lemmy.world 4 points 8 months ago

If you give someone paper and a pencil and ask them, "Please draw a diamond shape."

Most will draw a 4 sided shape with 4 equal sides.

[-] Sludgeyy@lemmy.world 0 points 8 months ago

People would definitely want to elongate the top and bottom sides because they do not want to draw a sideways square, which is a rhombus, parallelogram, diamond too.

There's no way a human is going to draw 4 equal lines

No one at the end is going to be like "yeah but you have to be sure all sides are equal" when they have some kind of weird kite shape.

There's people out there that wouldn't count a sideways square as a diamond

[-] Knock_Knock_Lemmy_In@lemmy.world 1 points 8 months ago

Kites have 2 edges the same length, as do trapezoids, but they aren't touching. A Rhombus has 4 equal edges.

[-] Kusimulkku@lemm.ee 1 points 8 months ago

For me the shape I was thinking of was if you take a simplified 2D version of this 💎, with there being 4 sides, 2 pairs of equal sides but not 4 equal sides

I imagine what people are talking about here is this ♦️ sort of diamond.

I blame me not being a native speaker for thinking of diamon diamond

[-] hydrospanner@lemmy.world 4 points 8 months ago

That shape in 2D has five sides though.

[-] Kusimulkku@lemm.ee 0 points 8 months ago

True, I didn't pay enough attention but I though the two upper sides touched each others at the top, so it would have just 4 sides

[-] dudinax@programming.dev 4 points 8 months ago

In practice, diamonds have equal sides.

[-] lolcatnip@reddthat.com 17 points 8 months ago

In practice, diamonds are rocks.

[-] Honytawk@lemmy.zip 15 points 8 months ago

They're not rocks. They're minerals, Marie

[-] dudinax@programming.dev -1 points 8 months ago

In practice, diamonds are dirt paths with rubber vertices.

[-] Kusimulkku@lemm.ee 2 points 8 months ago

💎 what I'm thinking

♦️what I imagine is meant by diamond here

[-] faceula@lemmy.world 2 points 8 months ago
[-] dudinax@programming.dev 3 points 8 months ago

When most people draw a "diamond" shape, they draw it with equal sides.

[-] fat_stig@lemmy.world 10 points 8 months ago

Yeah, Shine on You Crazy Rhombus would never have been a hit.

this post was submitted on 19 Jan 2024
731 points (96.6% liked)

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