This is what we get when we cater to the dumbest kids in the class.
Comment on PI is what
LemmysMum@lemmy.world 8 months agoSure, until you actually need the correct result of the circumference of a circle and think pi is 5.
Reddit_Is_Trash@reddthat.com 8 months ago
echodot@feddit.uk 8 months ago
The dumbest kids in class can’t handle algebra.
It’s a really bad question for all sorts of reasons. Firstly because they defining π as 5 (it’s not even close to the real value) and they never explain what h is.
Also you should probably just use letters everywhere at this point and not use π unless π equals π.
LemmysMum@lemmy.world 8 months ago
No child left behind = every child left behind.
zeppo@lemmy.world 8 months ago
I was thinking more it’s Freedom Pi from Florida or Texas or something.
vivadanang@lemm.ee 8 months ago
Pretty sure they call that frito-pi in Texas
zeppo@lemmy.world 8 months ago
Sort of. Frito Pie (my grandmother is from Texas and used to make it) is covered with Texas chili.
F4lcon@discuss.tchncs.de 8 months ago
So? You think you’ll get the correct result by using 3? Or 3.14? Not quite. You can only get infinitesimally close to the correct result by increasing digits of pi.
And of course, if you really need that circumference for something critical, guess what? You use the things people developed for this very problem, software packages, and so on. And of course, you get it double checked, triple checked.
If it’s assume pi is 5, it’s not misinformation. If they point guns at kids and say it’s 5 for real, then yes.
LemmysMum@lemmy.world 8 months ago
Or you could just use 3.14 which is infinitesimally more correct than 5, not lie about the number and aim for correctness and accuracy so people learn how to do things right the first time.
If you can’t handle a few decimal points then you aren’t ready for pi, go back to third grade.
F4lcon@discuss.tchncs.de 8 months ago
I don’t think you understand what infinitesimally means! It means the opposite- you want to use ‘infinitely’ there.
Now, not being a condescending asshole, I really take issue with you calling an approximation a ‘lie’. And honestly, who’s multiplying decimal points mentally? That’s difficult. Use a calculator. Want to avoid calculators for an exam? Simplify! That’s why they use 5 and not 3.14.
LemmysMum@lemmy.world 8 months ago
infinitesimally I was typing in a rush and mistyped, but you understand what I meant.
Simplify! That’s why they use 5 and not 3.14.
That’s a bullshit excuse. 3 could be argued but 5 is straight disinformation. And I do multiplication of decimals in my head because I was taught how to in school, that’s how far behind the US system is.
aesopjah@lemm.ee 8 months ago
Like, at least make it 3 instead of 5. Still allows for mental math
LemmysMum@lemmy.world 8 months ago
It’s fucking pi. It’s a constant that will never change in their entire lives, just teach reality the first time instead of making up a thousand little lies to correct later.
fsxylo@sh.itjust.works 8 months ago
What do you mean there are more than 3 states of matter?
echodot@feddit.uk 8 months ago
Wait until they start to learn about quantum foam and super fluids.
aesopjah@lemm.ee 8 months ago
Gotta cut it off at some point though, right? How many decimals? 10, 4, 1, or 0?
Plus, this is a test not the knowledge delivery. Some thing as ‘assume a flat plane with no friction’ for a physics test. Yeah it’s not 100% accurate but the test taker can be evaluated on the methods
echodot@feddit.uk 8 months ago
How are you rounding 3.14… to equal 5?
zeppo@lemmy.world 8 months ago
But why 5 and not 4 or 3?
LemmysMum@lemmy.world 8 months ago
Everything is knowledge delivery if the knowledge is correct.
hansl@lemmy.world 8 months ago
Or just use a cube and say one side is 5 long. Does it really have to be a cylinder?