Circles: Radius, Diameter and Circumference

[KatieRose1014]

UR AWESOME!!

[obieelibya77]

I wish u were my teacher

[roseali1000]

I wish our stupid teacher wouldnt teach soo stupidly!! Ughh this was helpful ....

[badboy21223]

Fuck this shit. I'd rather do homework in class.

[impossiblypossible18]

18.84955592153876, that's the answer at 9:01

[NouraHosam]

@impossiblypossible18he is supposed to approximate it but he didnt, our teacher tells us approx. it to 3 s.f. :)

[oliver18754]

@godlyangel012

You really need to go back to grammar school, your parents failed at teaching you proper grammar. Did you try learning English grammar online too?

[oliver18754]

@muchumundo

Try learning. Enjoy.

[muchumundo]

FUCK I WISH I HAD MY GRADE 12 DIPLOMA

[godlyangel012]

18 point something something something

[godlyangel012]

how can someone dislike this !

[godlyangel012]

how u make the penmenship so nice

[godlyangel012]

ha ha

[godlyangel012]

your very nice i am homed so it is very nice

[Yogonful]

Pi=3.14 or 3?

[ngarcia1995]

Half the class wouldn't be failing

[ngarcia1995]

I love these video's! If my math tea her actually did her job instead of flirting with the boys ha

[musicmadjellybean]

LOL 'How fat is the circle?' Made me laugh. :)

[hotcocoaa36]

this math teacher suck my teacher is BETTER!!!!!! OMG

[godlyangel012]

@hotcocoaa36 BOIL UR HEAD

[485blue]

we watched it in school today and at home

[lovelygymnast4699]

This video helped me so much, it saved me from getting an F

Thx KHAN ACADEMY!! XD

[MrNeverataner]

beautiful... hand-writing...

[lorenzo5220]

he's GOOD



[MrMrbrain99]

pi=22/7

[NiceVidYouGot]

this video ROCKS! XD

[45MydudeThe]

MaTH IS EASY

[1995a1995z]

I love how you explained how pi was discovered

[Zezzi365]

Hi, could you do a video on surface area and volume of 3-D shapes?

[BlackHeart121000]

Thanx you helped alot

[DiggyDogDD]

Thank you Khan Academy for teaching us kids to learn!

I find this great because you help me and probably other kids how to pass there exams and do there homework. :)

Hopefully you do more for us kids! :)

Thanks~

[SupremeAndroid18]

thank you. you are possibly the smartest person i know. you helped me on biology, and now geometry!!

[EtherMagic]

LOL Thank U!!! I'm 29 and just learned this shit!!! hahaha

[078matthijs]

@EtherMagic never to late to learn ;)

[AustinG49]

People don't appreciate good help these days. Shut up and be glad he is willing to help you.. GOD!!!

[headfrist]

no homo, but i love you man; you are the best teacher ever.

[0wolfplayer0]

0 : A circular shape

O : An oval

D : A semicircle

. : a... Point?

8 : 2 circles

The world is so full of circles!

[XraneXify]

wow so much fighting.

[ephemerealfox]

when ink and pen in hands of men inscribe your form bipedal p

they draw an altar on which god has slaughtered all stability.

no eyes could ever soak in all the places you anoint,

and yet to see you all at once we only need the point.

flirting with infinity your geometric progeny

which fit inside you all so tight with triangles that feel so right

3.142592653...................­.......................

~hard n phirm

[ToeIn2194]

@WarpFieldTheorist Thank you.

[ToeIn2194]

@WarpFieldTheorist I didn't mean to sound like a smart ass. I just got confused. My teacher told me I had been wrong so I posted "never mind" I guess you didn't see that comment.

[ToeIn2194]

Circles don't have wide points. They are the same all the way around.

[faisalbaderfaisal]

This video suckssssssssssssssssss

[sibghatullahdad]

@faisalbaderfaisal Fuck you Kanadian bitch .

[Jackass333303]

@faisalbaderfaisal  u suck dick

[mapukmapuk]

@faisalbaderfaisal go suck to yourself

[FarrenfollowsBen]

5 star video ...shows that pi is not some magical number that sprang out of nowhere!

Go Khaaaannnnnnn!!!!

[soiierre]

what did he say?? lol

[GuitarLegend71]

Now I have an A+ in math class, and I use these videos every nght, even though I'm in 6th grade!!!!!!!!!

[fufightinninjas]

tht was confusing

[100nassar]

Hi Sal,

I just skinning through your Geometry an noticed you , when talking aout PI, mentioned many books written on PI.

I thought You may be interested that there is a World-Record-breaking-book on PI called: "the most boring book in the world"!

It is a book of all numbers--consisting of PI printed out to ONE MILLION places!

--dale nassar

PS

It starts out:

3.14159265358979...

[sk8freek246]

@100nassar haha I wonder how much it sells for

[ABCba5tard]

@100nassar dam that is alot

[flameripple]

Thank you SOOOO much you SAVED my math homework!

[godlyangel012]

@flameripple yep mine 2

[justsome1else]

thanks u help a lot lol

[MrShakespere]

Thank you so much!

[Minnielovelove]

thks so much i have to prepare for a maths test tomorrow and u helped me!

[movielova96]

tnx this is amazing...my teacher stinks!!!she can only talk!

[DeViLiN888]

Amazing explanation. Especially I liked the part about circumference and the magical number pi. Now I understand where pi comes from. Thank you very much!

[serenademejazz2]

please make some videos about geometry..

thanks for this vid btw

very very useful for our exam tomorrow ::D

[luketheduke1982]

Thankyou so much sal.

[yoon715]

amazing video! i never thought of pi like that!