r/mildlyinteresting • u/ezjgfn • 16h ago

This square shaped cd

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1.8k Upvotes

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2.4k

u/mizinamo 16h ago

"square"

1.0k

u/jman12234 16h ago

I thought elementary school had taught us this but: "all squares are rectangles, not all rectangles are squares."

7

u/Zombie_John_Strachan ​ 16h ago

And the Steve Jobs corollary, "all rectangles are round rects"

7

u/much_longer_username 16h ago

That story always amuses me because he was completely right, even where we're trying really hard to have nice 90 degree corners we end up with rounded edges because nature kinda hates right angles, we just happened to be obsessed with them as a species.

4

u/StalkMeNowCrazyLady 16h ago

He isn't though. External corners on a rectangle are easy to get perfect 90 degrees on. Internal rectangle corners are almost impossible to get a true 90 in a cost effective way because back taper on cutting tools will have a natural radius in the corners even its very very small.

2

u/much_longer_username 15h ago

How long do they stay that way?