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.

[@hi-gj5gh]

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

[@tgsgaming3998]

He writing with the mouse is satisfying

[@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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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

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They make everything so complicated

[@truly__grace5754]

I know my school made me watch it

[@truly__grace5754]

They make everything so complicated

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I feel his voice comforting

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Asa Jaman true

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You can't fucking spell.
(gzfhdzgfyjdthuksztgshj)

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weirdo

[@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

[@z3nkana]

My brain hurts

[@leylahisswaggy6789]

hello miu

[@z3nkana]

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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

[@aesthetic1113]

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

[@dinaeguizabal6854]

Lol

[@masegopheto7000]

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

[@refahalmansoori9589]

@@dinaeguizabal6854 2021

[@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

[@yappsville]

This is where I go after skipping a day in school

[@hadiimram1959]

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 💀

[@Warzaw911]

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

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hey no cussing

[@heena_bilal0]

who tf asked lmfao

[@rajalakshmi5022]

I understood very much

[@sanjaygairola9542]

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

[@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!.

[@Dime-.]

THANK U SO MUCH THIS HELPED ME SO MUCH

[@mooncxtton7371]

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

[@shirleyh9800]

this is amazing

[@ms.b4268]

The key to area is length times width

[@coffeeand4boys103]

Or length time breath

[@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

[@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

[@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

[@bazooka3111]

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

[@saimashawkat]

Si am i

[@duanemorey9340]

Kahn academy is teaching me a lot

[@rashmikukreja8154]

Thank u so much for the easy explanation...

[@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 ☺️

[@chaotictuna]

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

[@bhipcx6964]

thx man you helped my grade improve

[@khanakan6455]

i can learn very fast from him

[@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?

[@skankhunt-yl5pk]

Your way better than my teacher

[@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

[@opendatruth]

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

[@7_alxe]

Nice

[@naomi4theos56]

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

[@Taste-The-Rambo]

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

[@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!!!!!! 😬

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

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

[@imablobfish2839]

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

[@skywalkerkms]

Thanks dude really helped me in school

[@bazooka3111]

He’s Bengali say Thomi Onek Posa.

[@sean_kun8981]

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

[@hi-jj4os]

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

[@elmo9097]

true

[@kebabkebab6312]

Yuki - Kun because screw education

[@truly__grace5754]

Same

[@crystalthyme2086]

same, yuki-kun

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уυкι - кυη bruh

[@visual_minji]

you explain it so well! thank you!

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I’m watching dis bc I have homework:(

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sane

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YOU SAVED MY LIFE I LOVE YOU

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Riley Young da fuq is rong wit u

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Ok!!???

[@ranielbenedictroquetala5381]

tysm i had a test today

[@midnightmoon336]

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

[@hilop33]

did u ?

[@samarthsurchowdhury3485]

thanks would recommend this to my friends !

[@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

[@robiirawan343]

Thank you for teaching me! ☺️💕👍🏻

[@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

[@hollicowmc6041]

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

[@heena_bilal0]

no one asked

[@hs7440]

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

[@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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Honestly, you are a life saver

[@michaelzerr8248]

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

[@anushkabhandari9508]

That looks perfect

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Thanks . This channel is awsome. I subscribed

[@tamermostafa8286]

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

[@ahadmatic4049]

Man I wish he was my Teacher

[@mystickitty9273]

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

[@yoonsunkim4411]

Thanks for helping

[@kainenyenke5736]

thanks a whole bunch

[@meetusharma4717]

Thank you mr. khan! This is really helpful!

[@AadarshPandeyop]

*Mr sal

[@monkey_d_luffy12]

I understand in minutes wow nice teaching

[@specialkids4662]

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

[@gurjeetsahota6579]

thank you for teaching me perimeter and area

[@sharonzhong805]

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

[@natalieshrestha3003]

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

[@guadaluperico18]

It's only 1 year old

[@bigreddsgamereviews2215]

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

[@heena_bilal0]

who asked

[@prof111]

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

[@omarshrief12]

I Egyptian and he is very good

[@mos4535]

YOU ARE AN ANGEL BRUV.

[@deribabalcha1410]

I like it I appreciate it keep it up

[@fatemamustafa3646]

I still need more teaching .

[@ms.b4268]

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

[@jesusrodelas1757]

thank you for teaching me

[@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

[@originalseankelly6799]

Helpful!

[@tielcook6088]

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

[@mysticaladnan_1913]

Do you mean forever

[@jussanesanchez9652]

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

[@ilariadelfrate6926]

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

[@ananykakade]

Thanks helped me a lot

[@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

[@crackedmogulduo2475]

he has better hand writing then me while he writes online and i write in irl

[@SkittleflakeKitty]

test tomorrow
*opens khan academy playlist*

[@fahadrashid1953]

you saved my life tomorrow i have a test

[@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 CZcams 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

[@splitzy1157]

This was made the same year as when I was born and I’m seeing it 10 years later? Wow..

[@nazmaahkter4682]

Thank you for helping

[@aryabhanduth1566]

What about irregular shapes

[@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

[@livingwellwithinmeans7219]

That was the best thing I ever saw

[@LightLock]

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

[@notshipley6164]

Thank you

[@user-if4qy4ny3m]

I love it

[@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

[@linix_6187]

yaa they are super cool