Radians and degrees

What a radian is. Converting radians to degrees and vice versa.

Category:

Education

Tags:

• Trigonometry
• radian
• degree
• math
• khan

[WHHB1223]

LOL, he needs to go attend to his wife. <333 what a good man.

[btrballin]

@Unit047 don't call your girlfriend or wife a bitch. that's not very respectful and makes you look like a douchebag instead of a cool guy. If she got home, im guessing she makes the money and you sit at home like a fatass

[LittleFella222]

@MileHigh537 Sure is i love mathamatics :)))))

[MileHigh537]

Helpful video, thanks. This helped me with figuring out the calculation of slope for aircraft descent rates. Pretty cool how this stuff works sometimes!

[themin91]

i wondered who is this genious human's wife...hint?

[bigtopbollocks]

Why did I not have this lesson at school? answer: Cirriculums Useless N Teacher Sucks. What a waste of money school was!

Let's hope the great Sal Kahn or can model gets into more schools!

and the CUNT model fucks right the hell off!

with the shit teachers!

[bigtopbollocks]

Another way to state it once you get round the mathy stuff! is that there are 2 x pi or 6.28.. radius lengths in one circle and one radius length around the circumfrence is 360 degrees divided by (6.28).....( or 2 x pi) = 57.2958 degrees per circumfrential radius length which is a radian!

if your in to cars and engines ect the radian is used to determine the number of metres per unit force a turn (torque) and multiplied by the number of turns / time to give watts or horse power!

[AbsolumentFabuleuse]

Wow, thanks so much, it makes much more sense to me now! :)

[Swh3913]

@Swh3913 No Wait never mind heard him wrong

[Swh3913]

Stupid question but what does sub-tan mean?

[coresnake0]

Hi there Sal great video as usual, I don't know if you were just pretending not to remember how to convert to radians for the sake of the video ;) but just in case the way I remember it is that radians usually look like A pi/ B so to convert to radians you multiply by pi (on top) then divide by 180. To get degrees its just the opposite of that.

BTW the plural of radius is indeed 'radii'.

[mattrocde]

i saw a REALLY neat trick while he was doing this when he was giveing out the problems like 45 or 2 or 30 your answer for the problem is how many times it goes in to the number of degrees the circle in questions is!