Perimeter and area: the basics | Perimeter, area, and volume | Geometry | Khan Academy

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Great geometry primer on perimeter and area. Listen carefully. Sal explains the concepts so you'll understand them.
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Geometry on Khan Academy: We are surrounded by space. And that space contains lots of things. And these things have shapes. In geometry we are concerned with the nature of these shapes, how we define them, and what they teach us about the world at large--from math to architecture to biology to astronomy (and everything in between). Learning geometry is about more than just taking your medicine ("It's good for you!"), it's at the core of everything that exists--including you. Having said all that, some of the specific topics we'll cover include angles, intersecting lines, right triangles, perimeter, area, volume, circles, triangles, quadrilaterals, analytic geometry, and geometric constructions. Wow. That's a lot. To summarize: it's difficult to imagine any area of math that is more widely used than geometry.
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[@vedavlisharma1751]

He can teach me in like eight minutes while it takes my teacher a week 😆

[@dinaeguizabal6854]

XD

[@ememdaniels2418]

Lol

[@Angela-jk6tz]

My teacher thinks scaring us will make us magically pass

[@danaassi3490]

Lol yeah

[@folks1017]

Facts

[@kwrifles]

Thanks for the video. I havnt used these formulas since middle school and now im learning programming 15 years later and I totally forgot how to do these.

[@felicia_do_animation7222]

I'm trying to learn this before my teacher teach my class this

[@abhisheknair9261]

it is actually a good practice cuz then it becomes easier to do when actually in class

[@jasminesaint5000]

SAME LMAOO

[@akipurple7173]

Your teacher: ok I don’t think anyone did this You:objection

[@samantaakbarkhan6542]

@@akipurple7173 me while doing coordinates during class

[@masteroids]

My dad showed me this video and no I get it! Thanks Sal! Posted by Mark's daughter!

[@Ash-en1he]

Nice how’s it like seeing a 8yrs old comment

[@tehminaawan6055]

@@Ash-en1he lol

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You reliaze right now she would be 16 LOL

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@@itachiuchiha2256 lolz😌

[@amrahkhan4291]

This came 1 year after I was born and I am learning this now after 10 years

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That’s not possible

[@samantaakbarkhan6542]

Yes it is

[@samantaakbarkhan6542]

This video was made 8 years after I was born

[@arakkalabu925]

*9

[@aduckluck718]

Same

[@aesthetic1113]

this was posted in 2011 but almost all the comments are from 2020

[@dinaeguizabal6854]

Lol

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It's hectic😭

[@victoriusv3108]

Probably cause people only had time to watch it this year cause of u know , whats happening

[@arandomvillager488]

Homeschooling and teacher's who are done with teaching their class

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My brain hurts

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hello miu

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HOWDNTHIS GET TEN LIKES HELP

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@@z3nkana LET'S BECOME FRIENDS BTW CAUSE I THINK WE ARE LIKE IN THE SAME GRADE

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I feel his voice comforting

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Lol WTF

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Asa Jaman true

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Asa Jaman sorr th outta url

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You can't fucking spell. (gzfhdzgfyjdthuksztgshj)

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weirdo

[@vishenbeeful]

Khan sir wereu really doing that on a comp where as I can not even write A and ya u are a great teacher

[@wolfang08]

He is using a drawing tablet which makes it easier I own one too. it's still very hard lol

[@idrisnasima1315]

Hi

[@master_killia4229]

They make everything so complicated

[@truly__grace5754]

I know my school made me watch it

[@truly__grace5754]

They make everything so complicated

[@Warzaw911]

You guys saved my grade's ass multiple times. Thanks.

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hey no cussing

[@heena_bilal0]

who tf asked lmfao

[@hi-gj5gh]

this guy explains better than my teacher, I always end up coming back to him.

[@hi-jj4os]

*I’m reading the comments instead of learning.*

[@elmo9097]

true

[@kebabkebab6312]

Yuki - Kun because screw education

[@truly__grace5754]

Same

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same, yuki-kun

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уυкι - кυη bruh

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This is where I go after skipping a day in school

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This should be pinned

[@ramsquad8421]

B

[@ramsquad8421]

I don’t get it

[@thetroll8973]

69 likes nioce

[@sier8517]

@runaway bro I missed 2 full weeks and missed a whole lesson. We have a quiz tmr 💀

[@Hello-rg5bo]

Sir perimeter is the one which we should learn carefully ..because of those methods .. in this video we can easily understand the methods .. and it's awesome

[@michaelzerr8248]

yup completely right

[@jay-bj9pq]

In year 8, I have a test in 3 days..I’ll tell you if I get high marks!

[@jett5410]

Its been 3 months. How did you do?

[@RaedRahim]

@@jett5410 him not responding should answer that i believe

[@jett5410]

Raed Rahim Good point

[@andreatimbreza6465]

So???

[@jett5410]

Running on four months dude. Cmon. I’m anxious

[@tgsgaming3998]

He writing with the mouse is satisfying

[@bazooka3111]

I’m so happy that Khan Academy is by Bengali people and I’m Bengali :D

[@saimashawkat]

Si am i

[@crunchyleaves.]

My Mom told me that your videos are intriguing and interesting and helpful so i watched it. And now kabam i got good grades!! Thx ☺️

[@ms.b4268]

The key to area is length times width

[@coffeeand4boys103]

Or length time breath

[@idontusethisanymore1648]

YOU SAVED MY LIFE I LOVE YOU

[@elmo9097]

Riley Young da fuq is rong wit u

[@bgnthflame5686]

Ok!!???

[@thisdefsuckslol]

I have a test next week and I have to go in person so I have to study this and this has helped me understand much better 😭✋🏼 ty

[@jassagoo9478]

Good luck gg

[@rajalakshmi5022]

I understood very much

[@storiesandtaps8510]

How do I do this problem? The Horst's living room floor measures 11.5 feet by 19.5. A stairway along one wall takes out an area 32 inches wide and 9 feet long. How many square yards of carpet will it take to cover the floor?

[@chaotictuna]

In a nutshell Perimeter=Add up all the sides Area=Length x Width

[@azzrivaaliyayulizar3991]

ILYSM TOMORROW IS MY QUIZ IN THIS AND I WAS ABSENT FOR THE LAST 2 WEEKS BUT THIS HELPED ME ALOTTTTTTTTTT

[@lord-o-mama8038]

Same!!!!!! 😬

[@robloxiancitizen4500]

azzriva aliya yulizar did you suffer an stroke cause you sound like you had a caffeine overdose

[@mooncxtton7371]

Was near tears when I was searching this video. After, I felt a lot better and could understand. Thanks

[@courtney_timmins]

This is super helpful, I used to be able to do this but I always manage to forget the simplest things especially under the pressure of a time limit and all. I need to start train in my memory and this video did a great job at reminding me, thanks so much.

[@Aayush67761]

Same

[@heena_bilal0]

who cares bro

[@James1239170]

Area being length times width, Perimeter is by adding all of the sizes of the sides together.

[@marichat6403]

I learnt well about perimeter and area this vedio .thank you

[@leannagisselle]

I’m watching dis bc I have homework:(

[@Zayrtnow]

sane

[@sofiasartssongsandplaytime8177]

What are you talking about

[@sanjaygairola9542]

nice one i understood nicely in once .....

[@Taste-The-Rambo]

I learned this years ago but I’m doing a refresher on my online classes, can’t remember this at all

[@skankhunt-yl5pk]

Your way better than my teacher

[@shirleyh9800]

this is amazing

[@hollicowmc6041]

for me you are the best teacher for science and math xD Lewl

[@heena_bilal0]

no one asked

[@opendatruth]

we learned perimeter and are two weeks ago this is gonna help me alot

[@7_alxe]

Nice

[@imablobfish2839]

This channel explains things so well thank you for teaching me!

[@midnightmoon336]

Thx so much I have a test on this tomorow and I’m sure I will get a good grade!

[@hilop33]

did u ?

[@katelynnp.2346]

I am in 4th grade and is way ahead of level in school!!! THANKS

[@StainlessForks]

me too im grade 4 too and I am watching this for my quiz bee

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3rd lel

[@wolfed3758]

6th grade lol

[@funsiez]

3rd grade meh

[@hcnxji2342]

Doing this for S back aka Caaspp or state testing

[@specialkids4662]

currently panicking to understand this and other topics for our math test that she just briefly goes over :,)

[@jussanesanchez9652]

summary: perimeter add the sides rectangle length * width square area: a* thats a square.

[@robiirawan343]

Thank you for teaching me! ☺️💕👍🏻

[@Dime-.]

THANK U SO MUCH THIS HELPED ME SO MUCH

[@Omni-Tier]

Techer takes to teach me like for 2 weeks and still i don't know any thing but you in 8 minutes i understand 😂

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my teacher explining bearly anything Mr. khan explains everything and makes it look and feel so easy!

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Thanks . This channel is awsome. I subscribed

[@lil40_official]

It's been 3 yrs later and you still give me the easier understanding in math, ughh unlike my teacher takes 2 -3 weeks LMAO

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he can teach me alot my life be better i love math alot♥🌷

[@auxiliary6921]

(Upvote this comment) For all the people thinking about dropping out, don't. I dropped out back in 2016 during my freshman year and I'm currently doing this math at 20. Over time, lack of education deteriorates your math skills and right now I'm having to re-learn everything all the way up to geometry. For easier study methods I recommend looking up the Pomodoro system, it's quite tremendously paved my success in independent studying. Let me know if it helped you too!.

[@duanemorey9340]

Kahn academy is teaching me a lot

[@rashmikukreja8154]

Thank u so much for the easy explanation...

[@sabaalyamani5328]

this was uploaded when i was 3 years old now i’m 13 trying to understand the lesson, anyways thank god there are people like this on KZbin thank you for this video :)

[@circulatingflute]

wait a minute

[@circulatingflute]

oh wait nvm im so dumb

[@user-tv3dh8cc8z]

You're too young to suffer from math😭

[@user-tv3dh8cc8z]

Math should grow up and solve its own problems

[@bhipcx6964]

thx man you helped my grade improve

[@skywalkerkms]

Thanks dude really helped me in school

[@bazooka3111]

He’s Bengali say Thomi Onek Posa.

[@naomi4theos56]

Thanky you for this video . I helped me alot in my math exam

[@s.syphus]

Honestly, you are a life saver

[@meetusharma4717]

Thank you mr. khan! This is really helpful!

[@AadarshPandeyop]

*Mr sal

[@bigreddsgamereviews2215]

Im 17 yrs old and i love this guys video. Always teaches me something new

[@heena_bilal0]

who asked

[@sammythebones]

For any of you guys confused about perimeter, all you do is add up the sides.

[@sammythebones]

Also, keep this up

[@sammythebones]

keep this up

[@sammythebones]

keep this up

[@sammythebones]

keep this up

[@khanakan6455]

i can learn very fast from him

[@tielcook6088]

He can teach me in two minutes but my teacher takes three weeks

[@mysticaladnan_1913]

Do you mean forever

[@tamermostafa8286]

AYY I SAW THIS VIDEO WITH THE MOST VIEWED AND ITS FUN

[@mystickitty9273]

Thanks for helping me understand area easier I used to struggle with it all the time but now I understand

[@hs7440]

Thanks so much helped a ton i understood everthing rewinding helps too so yea thank you

[@sean_kun8981]

Omg thank you so much i was always confused and sometimes i thought area was the perimeter

[@visual_minji]

you explain it so well! thank you!

[@prof111]

it helped me alot if you were my teacher i would get all

[@fatemamustafa3646]

I still need more teaching .

[@ms.b4268]

Agreed me too I'm a little rusty because I am quarantined in this house

[@mos4535]

YOU ARE AN ANGEL BRUV.

[@sharonzhong805]

nice video sal I learn a lot from khan academy and still am

[@leilani8935]

Omg this helped soo much thank you so much I’m so grateful for you vids

[@ajcarlo9992]

Lanis Life Lmao, finally someone who understands

[@elmo9097]

UwU _gachasundae no one likes gacha

[@samarthsurchowdhury3485]

thanks would recommend this to my friends !

[@tiffytoffu]

he teaches me in 8 mins while it takes my teacher 3 weeks xD

[@vedavlisharma1751]

U copied my comment but what ever 🙈

[@tiffytoffu]

But I didn’t even look at the comments untill now-

[@Max-mp5xk]

@@vedavlisharma1751 chille, people can have the same thoughts

[@vedavlisharma1751]

ToyLoser I wasn’t making a big fuss abt it k? Non need for conflict kiddo ok?

[@tiffytoffu]

Guys please so fighting for me it’s like 7:00 I’m the moring

[@ahadmatic4049]

Man I wish he was my Teacher

[@SkittleflakeKitty]

test tomorrow *opens khan academy playlist*

[@kainenyenke5736]

thanks a whole bunch

[@ranielbenedictroquetala5381]

tysm i had a test today

[@angelinashewchuk7644]

your a great teacher, but you forgot to put cm, m, dm, km,

[@fatmasrour8652]

Or ft,

[@RV9412]

or literaly any other measurment

[@maychen5665]

This is for school because I watched this on online school.I guess for other kids too.

[@user-lo3gr1ci3i]

May Chen yes

[@yoonsunkim4411]

Thanks for helping

[@mystakkeve422]

How does he write with a mouse so good (excuse my grammar)

[@iamwml_]

Cryo Pyro might be using an iPad with pen or who knows?

[@m.k4252]

Maybe a stylus?

[@nene4uify]

right angle is irratating and my teacher makes things complicated when it is actually easy and this week is exam week so you can feel for me

[@beomvl4043]

Heh I have a math exam tomorrow..... I'ma fail 😃👍

[@skankhunt-yl5pk]

Lets just hope this helps me get a good grade for my first report card, and 8th grade six flags event

[@LightLock]

thanks for this. I was behind on my lessons this helped a lot.

[@anushkabhandari9508]

That looks perfect

[@ilariadelfrate6926]

Is this video adequate for year 8 math UK, or grade 7 US?

[@natalieshrestha3003]

This video is 6 years old and it's still helpful

[@guadaluperico18]

It's only 1 year old

[@amiitay]

Hey so im a sixth grader and this helps me after when I did not attend class :D

[@theslayer5993]

Subscribe today.This guy really gets through to you.

[@gurjeetsahota6579]

thank you for teaching me perimeter and area

[@daniellemclean58]

Am happy cuz we being learning this ni school and l love learning this thank you so much omg this it’s amzing you amzing and it’s just perfect thank you so much xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

[@miantv9231]

Dude thank you know I und Rostand area you are going to make me bomb my test yo bro I love watching your videos

[@deribabalcha1410]

I like it I appreciate it keep it up

[@splxitzwtf9442]

Bruh im doing my practice FSA and left off on a perimeter question and well I'm sure I got it write:)

[@arandomvillager488]

I think you meant right wright is writing something just a small mistake you made no hate

[@splxitzwtf9442]

@@arandomvillager488 oh lol that was a mistake I did not even notice thanks for pointing it out to me😅

[@ajcarlo9992]

Thanks, god i was feeling real dumb xD Fast and simple explanation

[@jesusrodelas1757]

thank you for teaching me

[@omarshrief12]

I Egyptian and he is very good

[@TheHongkong4003]

very nice guide I got a problem in a question. will you please help me the question is "the rectangle will have a longer perimeter than the square.find two examples to show that this is sometimes correct and sometimes wrong" thank you

[@joeyjoey9013]

this video I studyed last minute and my exam I got 89/100 thank you soooooo freakkkking much