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That's a really good point.
(lemmy.world)
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this post was submitted on 19 Jan 2024
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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".
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.
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.
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
Kites have 2 edges the same length, as do trapezoids, but they aren't touching. A Rhombus has 4 equal edges.
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
That shape in 2D has five sides though.
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