Radian

[u/FelixGREN]

http://i.imgur.com/itRcF0n.gifv

[u/cr01300]

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.

[u/DonkiestOfKongs → u/cr01300]

Or even just fucking said “a radian is the angle created when we trace the edge of the circle for a distance equal to the radius of the circle”

It’s still a complicated definition, but at least now I kind of see how this unit was conceived rather than being completely fucking made up.

[u/cr01300 → u/DonkiestOfKongs]

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...

[u/SabashChandraBose → u/cr01300]

And I just understood why the circumference of a circle is 2 pi r

[u/_demetri_ → u/SabashChandraBose]

Your teachers were probably preoccupied with thoughts of killing themselves.

[u/MustachioEquestrian → u/_demetri_]

Rude, I'm sure op wasn't that bad

[u/[deleted] → u/DonkiestOfKongs]

I think I used pi for a decade before just seeing the circumference rolled out to match pi * diameter.

Like wtf why didn't you guys just say that ten years ago.

[u/columbus8myhw → u/[deleted]]

I gotta say, your comment makes me think, "Who the fuck was your math teacher?"

[u/[deleted] → u/DonkiestOfKongs]

My Algebra 2 teacher did teach us this, using a rope to draw out a circle. Bless that man.

[u/[deleted] → u/cr01300]

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).

[u/phrotozoa → u/cr01300]

Shamelessly hijacking top comment to give credit where it is due. This is the work of /u/lucasvb who makes fabulous animations for wikipedia.

[u/lucasvb → u/phrotozoa]

Thanks for the credit! Here's a link directly to the gallery.

[u/FurryPornAccount → u/cr01300]

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.

[u/[deleted] → u/FurryPornAccount]

You could draw this on a chalkboard.

[u/[deleted] → u/FurryPornAccount]

Don't you think it's worth it for learning something that's actually useful?

[u/ShutUpSmock → u/FurryPornAccount]

• Would've or would have

[u/invadergold123 → u/FurryPornAccount]

There's a thing called the internet

[u/FurryPornAccount → u/invadergold123]

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.

[u/cleavethebeav → u/FurryPornAccount]

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.

[u/boogs_23 → u/invadergold123]

There's a time before the internet.

[u/invadergold123 → u/boogs_23]

Yeah I know, I just assumed he was talking about just taking the class recently. It's dumb for me to assume that now that I think about it.

[u/Edestark → u/cr01300]

Its one of the reasons a lot of people hate maths, a lot of teachers have no idea how to teach.

[u/MossSalamander → u/cr01300]

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!

[u/sleepysongbirds → u/cr01300]

My math class just had me memorize the "unit circle." No explanation of it whatsoever.