Ha Ha, non-Euclidian geometry go brr. :)
Bye, bye, miss American PI.
Maybe Vader some day later, but now it’s just about prime.
This was written by an engineer. They rounded up to 5 for the safety factor.
What kind of problem gives you the formula and all variable to replace? At this point, why not just write 5•10²•10=?
Intro to algebra type stuff to make sure you understand the concept of variables in the first place
Even then, I would want them to leave π in the problem itself. That would be much better for this exercise - teaching that you report “exact” values with π still in them.
Eg, if I rewrote this problem, I would expect an answer of 1000π.
Pi= 5 in this teachers reality. Circles must look wonky.
…fractal circumferences can be whatever length you want for any given mean radius…
It makes it easy to do the math in your head without a calculator. But still , just tossing out pi=5 is not the way to go about creating these problems.
Cause reading comprehension is part of the test. Lots of kids will be able to solve that equation, but there’s a bunch who can’t understand it if it’s presented this way.
Honestly here they should have done “round pi to two decimal places” or smth.One written in Comic fucking Sans
It’s official, the observable universe is ~3 times larger!
Man the Americans… everyone knows that π=-10
Nah, π = 3.2.
the Speaker accepted another member’s recommendation to refer the bill to the Committee on Swamplands, where the bill could “find a deserved grave”
Lmao
What in the idiocracy
It went to far and Beck.
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Americans are more fat so they need bigger Pi to keep geometry in touch with reality.
I remember when Pi was monetized, that sounds like Pi Common, only $9.99/mo for 0 significant digits.
Ah yes. I have heard about that.
American Pi.
Believe it or not, there is precedent for this.
“Now this is a fucked up situation.”
Round Up.
round
heh
I’m an American. I weigh about 140 lbs (63.5 kg). I’m about 5.75 ft (1.75 m) tall. Am I fat?
Fat? No, but dumb enough to understand my phrase as “each and every without a single exception”. Dumb as an American.
I’m not the one making dumb generalizations. Fuck off with your stereotypes.
Yes, you should lose 100lbs. Just look at people who were forced on a diet. They were just bones because they had nothing to eat but flour and water. You got to go for the emaciated look.
Manlet. Barely better than fatass.
Sick burn. Especially from a Belgian! Waddle waddle
Calculator not allowed test probably
3.14 would be easy enough to solve this one. r^2*h resolves to 1000, so V would be 3140.
Even if so, the other factors are both 10. How hard can it be…
I didn’t get to use a calculator IN CLASS until late in my bachelor studies — forget about using them for tests. In a world with Chatgpt we need to teach in a more sterile environment or standards are going to swing into the ditch. My friend who is a grade school teacher has told me some stories that would make your ears bleed.
It’s clearly just saying that the surfaces on which the ends of the cylinder lie are metric spaces with distances defined using Chebyshev or Taxicab metrics based on pentagonal tilings of the parabolic plane so the ratio of a circle’s circumference to diameter is 5.
Since it’s a cylinder we assume the vertical dimension is Euclidean and voila the math checks out geometrically.
Whoa, amazing!
Astrology is so cool
It’s probably trying to teach kids algebra without using decimals. But it does look messed up. Everyone knows at least 3.14, except kids I guess
My dad told me a rhyme to memorize like 15 digits of pi before I knew what pi is at like eight years old I’m guestimating. I remember it ever since.
… Yet refuses to share it with the world!
It’s in a different language.
I got my daughter to memorize 50 digits of pi when she was 11 or 12 by betting her $50 she couldn’t.
My 7-year-old got obsessed and did it from a YouTube video to 100 places because he was bored.
He also knows base 2 to 65536
My buddy in high school had it memorized it to 700+ digits. He was bored.
I’ll remember that, but she is four now…
I’m goons gonna try it with my 7yo. I’ll report back if he gets anywhere. On the plus side $10 should be enough incentive.
Von nichts kommt nichts. Also los.
I’m fine with 3, maybe 4, but 5???
Everyone knows at least 3.14
And biblical authors.
In Terry Pratchett’s wonderfully witty Discworld novel, Going Postal, the topic of pi comes up in a rather humorous and characteristically Pratchettian way.
The newly appointed Postmaster General, Moist von Lipwig, encounters a rather eccentric inventor named Bloody Stupid Johnson. Bloody Stupid Johnson is known for his, well, stupidly brilliant inventions. One of these inventions is a new kind of postal sorting engine.
When discussing the design of a wheel for this engine, Bloody Stupid Johnson proudly states that he designed it so that pi is exactly three.
This is in contrast with how pi is otherwise consistently expressed on the Disc, which is “three and a bit.”
Notably, Bloody Stupid Johnson is so skilled/inept that he actually does make pi equal to three within the machine… somehow… which breaks reality in a small amount of space inside it.
Apparently King David had this skill as well, since this is mentioned twice in the old testament:
1 Kings 7:23: And he made a molten sea, ten cubits from the one brim to the other: it was round all about, and his height was five cubits: and a line of thirty cubits did compass it round about.
Clearly π was equal to 3 in old testament times, but geometry got all screwy when Jesus died for our sines.
might also be to teach actually reading the instructions instead of blindly typing pi into the calculator
This is how you develop trust issues.
This question was written by an engineer
Nice try, physicists.
There’s good reasons they engineers over calculate, because they know things break, that people don’t do regular maintenance and that people will over stress the object. So engineers have to account for things like this when designing an object or a device so they don’t fail prematurely.
Engineer here, I always just use pi and a “safety factor” multiplier. Extra material is expensive, and I want the cheapest part (like a screw) to fail first. We don’t just oversimplify pi because half the time it’ll make your design weaker.
(If I just got whooshed I apologize)
100%, also how would I indicate to colleagues or successors when I used what value for pi? Clear diving is a thing for me.
Safety factors are both more explicit and self-documenting up to a certain point.
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Factor of pi-safety
I’m familiar
It’s funny because engineers are known for making simplifications like this, not because the simplification is problematic
