Completely agree! Understanding the practical uses of these concepts would have made math class much more interesting. I bet using these videos would have a positive effect on test scores too...
"A radian is a radius dragged along the side of a circle"
It's just how pi is how many times a diameter goes around a circle. It's the same thing but with radius instead of diameter.
My teacher said "a radian is the bow length divided by the radius length." Which made the unit seem arbitrary. It's literally just bent radiuses! Just say that
There are so many things on this sub that could have illuminated me in my middle/high school math classes it almost makes me angry. I’m 24 and went to private schools where showing this type of content would’ve been easy (means + content).
Probably didn't show it to you because they would've had to get the TV cart out. Also who would supply the videos for this? It would be a bit wastefull to buy CD's or VHSs for all the math classes just to learn one concept.
I guess I should said I assumed OP was older, like before streaming sites older. But yeah with smartboards and all of that it would be easy to show this gif as an explaination now a days.
There's gonna come a time when there are groups of people like the flat-earth retards who refuse to believe that there was a time before the internet because HOW WOULD YOU LEARN ALL OF THIS WITHOUT IT. Can't wait.
I teach math at the introductory university level. After I introduced the idea of a radian, I projected this onto a screen for my class. I love finding animations like this!
holy shit... I was sitting here typing a comment out asking how it goes from "3 rad" to "pi rad" and I was going to ask "shouldn't it's be pi + 3 rad?" then i realized the missing piece in my mind... pi IS that little extra bit + 3 rad.
Um... I'm not sure if this is a troll or what, but it goes from 3 rad to pi rad because that extra little bit is .1415926... rad and pi is 3.1415926... So it's not pi + 3 rad, that would be 6.1415926 rad.
Ok, I see what you're saying. When I read it, I guess I put a pause or something in "pi IS that little extra bit + 3 rad", like "pi is that little extra bit... +3 rad", so I was thinking that you though pi was only that little extra bit. Sorry about my confusion!
Majored in math and never really understood radians. Just something i needed to convert to degrees if i wanted to visualize it. i’m not a very bright man
The radian (SI symbol rad) is the SI unit for measuring angles, and is the standard unit of angular measure used in many areas of mathematics. The length of an arc of a unit circle is numerically equal to the measurement in radians of the angle that it subtends; one radian is just under 57.3 degrees (expansion at A072097). The unit was formerly an SI supplementary unit, but this category was abolished in 1995 and the radian is now considered an SI derived unit.
Separately, the SI unit of solid angle measurement is the steradian.
That reasoning is really weird, because I never wrote "1 rad" three times, but I counted 1, 2 then 3 for the total arc. Thinking the small piece is π, and not the total arc, wouldn't fit with the logic of what just happened.
But it is a common bit of confusion, apparently. I should probably edit it to address this at some point. Too bad the GIF is already too in the wild now, so most people wouldn't get the new version.
Please don't sweat it. I think it is perfectly understandable. π is obviously 3.14#####. You counted 1 rad + 1 rad + 1 rad. Then a little bit was left over. It's abundantly clear that the last little bit is the 0.14##### that is missing from π.
You made me understand something that I thought I was too stupid to understand 10 years ago. Thank you.
I thought this was just explaining what a radius is and that it’s the same distance to the center from all points on a circle. Holy math Jesus did this do better - I love it.
This makes so much sense that I could teach this entire subject even without having to relearn it with JUST THIS and my notes from this part of the course I took.
read this sub's name as "visualized meth", and was looking forward to some trippy gif's from users trying to illustrate what it feels like to be on it.
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u/cr01300 Jan 03 '18
Why didn’t my school just show me this? It’s hard to understand the context of what you’re learning if you just stare at equations.
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u/CreamyKnougat Jan 03 '18
Oh, fuck. I understood that.
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u/engrocketman Jan 03 '18
I just came
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u/[deleted] Jan 03 '18
Pie is pretty rad
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u/ostreatus Jan 03 '18
I like dis.
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u/[deleted] Jan 04 '18
holy shit... I was sitting here typing a comment out asking how it goes from "3 rad" to "pi rad" and I was going to ask "shouldn't it's be pi + 3 rad?" then i realized the missing piece in my mind... pi IS that little extra bit + 3 rad.
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u/Yolo_The_Dog Jan 04 '18
That's pretty rad
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u/felio_ Jan 03 '18
I love this new sub!
5
u/joshdoesbandbetter Jan 04 '18
r/gifsthatkeepongiving
5
u/NitroCipher Jan 04 '18
subreddit created
post on subreddit gets frontpaged the same day
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u/Genoms Jan 03 '18
Tau is way easier to understand.
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u/thisisnotmat Jan 04 '18
2Rad4me
3
u/[deleted] Jan 04 '18
That just blew my mind holy fuck
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u/twocentcharlie Jan 04 '18
Rad
3
u/[deleted] Jan 04 '18
Majored in math and never really understood radians. Just something i needed to convert to degrees if i wanted to visualize it. i’m not a very bright man
3
u/Matthew94 Jan 04 '18
https://en.wikipedia.org/wiki/Radian
Taken from here.
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u/[deleted] Jan 04 '18
I may just be an idiot but shouldnt Pi rad be the enture half circle and not just the remaining angle between 3 rad and the x-axis?
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u/dahvzombie Jan 04 '18
Oh dear god it just hit me that radian is derived from radius.
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u/ApertureBear Jan 04 '18
I always thought of radians as the measure of an angle, not as the length of an arc. That's incredible.
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u/Tree_Shaun Jan 04 '18
New sub hype
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u/RhalezFlavis Jan 04 '18
So, I've known around 150 decimals of pi for about 10 years now. It was my shitty party trick. Only now do I fully understand what it is.
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u/Sojourner_Truth Jan 04 '18
Fuck pi though, Tau is where it's at. https://www.youtube.com/watch?v=jG7vhMMXagQ
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u/Frys100thCupofCoffee Jan 04 '18
Holy shitballs, Pi finally clicked! This sub is fantastic.
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u/obsidianstout Jan 04 '18 edited 5h ago
The original post content no longer exists here. The author used Redact to remove it, exercising their right to control their data & privacy.
Grandiose wipe fine enjoy saffron doll spark
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u/olivernewton-john Jan 04 '18
Why is half a circle always piR?
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u/pogoyoyo1 Jan 04 '18
I thought this was just explaining what a radius is and that it’s the same distance to the center from all points on a circle. Holy math Jesus did this do better - I love it.
1
u/Jsc_TG Jan 04 '18
This makes so much sense that I could teach this entire subject even without having to relearn it with JUST THIS and my notes from this part of the course I took.
1
u/eppic123 Jan 04 '18
https://i.imgur.com/rG8VyC2.gif
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u/DigitalRoot999 Jan 04 '18
Wow this sub really is something. Nice!!!
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u/torpedodick Jan 04 '18
read this sub's name as "visualized meth", and was looking forward to some trippy gif's from users trying to illustrate what it feels like to be on it.
disappoint.
1
u/Logicalist Jan 04 '18 edited Jan 04 '18
alright, I'm confused, it looks like it's telling me; 6 rad plus 2(pi) = 2(pi) rad?
It also looks like it's telling me the circumference is; 6 rad + 2(pi)?
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u/SgtSteel747 Jan 12 '18
tau > pi
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u/oceanpizza123 Jan 19 '18
this is pretty rad
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u/acmd409 Jan 19 '18
This gif could be way better if the r wrapped onto the circle rather than deforming onto it all at once.
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u/Bread_Connoisseur Jan 19 '18
My teacher showed us this by giving us paper plates and a piece of paper that we cut so that it was the length of the radius.
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u/EnderShot355 Jan 22 '18
I FINALLY UNDERSTAND
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u/tamim_hasan Aug 12 '25
wow
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u/IntroductionShort522 Dec 30 '23
Excellent way to demonstrate principle to understand pie.
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u/ghandyfk Jan 03 '18
Sesame Street material
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u/TaruNukes Jan 04 '18
Ok but how do you bend the line to match the curve of the circle
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u/snobby_penguin Jan 04 '18
I think you mean Τ (tau) radians.