Annoyed Thoughts

The Hungarian deli ran out of rum balls and the lady behind the counter didn’t call me honey, sweetie, luv, etc. :cry: :broken_heart:

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I am at a non-usual sbux: they are doing some repairs to one of the bathrooms and there is a whiff of terlet that is drifting past me!! Hoofahhhhh!!! :nauseated_face: :face_with_spiral_eyes: :dizzy_face: :confounded:

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Sounded like she ran out of the sweet nothings.

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I erased “it seems you didn’t understand my email” and replaced it with “it seems my email wasn’t clear.”

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did you remember to erase " you stupid ass"?

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I am one of the people with a package stuck in the black hellhole of Indy’s USPS regional distribution center. “Weather delays” yeah ok. I googled it, apparently this is a whole thing right now.

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Why, because 1 is listed as a prime number?

I was always taught that 1 was prime and have never understood the objections to calling it prime. It’s the most trivial of all primes, but prime. At least in my school books :woman_shrugging:

I am more perturbed by definitions of trapezoids that purposely omit parallelograms.

All the formulas for trapezoids work perfectly well on parallelograms. There’s no valid reason to not consider parallelograms a subset of trapezoids.

Just like equilateral triangles are a subset of isosceles triangles. No one disputes that, but call a parallelogram a trapezoid and hoo boy, that’s controversial.

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A prime is not divisible by “1 and itself”. A prime is divisible by exactly two whole numbers.

1 does not qualify. And 1 is not a “building block” of other numbers. It’s simply the multiplicative identity.

[red] I don’t think you and I can be friends anymore [/red]

I think my objection boils down to “it’s too trivial “ and mucks up the rest of math’s definitions if you include it.

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I dunno, that’s how I was taught from whenever I first learned about prime numbers… I think through college although conceivably it never came up in college.

I believe I was in my 40s when I became aware of the existence of numerate individuals who considered 1 to be not prime.

Can’t undo 40 years of thinking of it as prime, sorry. “Itself” IS 1.

1 is divisible by 1.
1 is divisible by itself.
1 is not divisible by anything else.
Ergo, 1 is prime.

That’s what I was taught. Granted, I was not in the fanciest of school districts, but it was also in the textbooks that way. :woman_shrugging:

Can we at least agree that parallelograms are trapezoids?

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I’m not sure we can even agree on that.

This has been the worst Friday ever.

Honestly, though, I have no preference to a trapezoid being defined as “only one pair” of parallel sides vs “at least one pair”. However, to be doubly honest, I prefer the former.

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:cry:

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That’s why I pointed out that the whole “divisible by itself and 1” is poor phrasing and not the actual definition. Because that phrasing clearly implies that 1 is prime.

When you did the prime factorization of a number in school, how many 1’s were in your answer? Hopefully zero, because 1 isn’t a prime factor (you know, because it’s not actually a prime number, and all that jazz) :slight_smile:

And sure, go ahead and call a parallelogram a trapezoid (and a square a rectangle while we’re at it). All the formulas and properties still apply (along with a few extras), so no problems there.

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Lol. This forum really is where fun goes to die.

I totally agree, just not sure why we are all getting jumped up over it.

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Why were you taught this in high school?

I assume you did higher level math in College…they covered this.

It is really just a definition. My earliest memories of primes always had 1 omitted. However, more recently I learned that 1 is not omitted from all lists of primes (not just by people who are mistaken), and there are reasons why it might be included. Let me see what I can turn up real quickly.
Oh, a history

Reasons it is excluded include the fundamental theorem of arithmetic would have multiple factorizations if 1 was counted as a factor (since it is the multiplicative identity element), and using it in Eratosthenes’s sieve would cause all numbers to fail to be prime (since all are divisible by 1).

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