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

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Lol

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My teacher thinks scaring us will make us magically pass

[@danaassi3490]

Lol yeah

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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.

[@masteroids]

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

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

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@@Ash-en1he lol

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You reliaze right now she would be 16 LOL

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

[@aesthetic1113]

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

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It's hectic😭

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

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

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

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

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SAME LMAOO

[@akipurple7173]

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

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@@akipurple7173 me while doing coordinates during class

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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

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Yes it is

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This video was made 8 years after I was born

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*9

[@aduckluck718]

Same

[@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!.

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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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He writing with the mouse is satisfying

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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

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Hi

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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

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This is where I go after skipping a day in school

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This should be pinned

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B

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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 💀

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I understood very much

[@hi-jj4os]

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

[@elmo9097]

true

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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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My brain hurts

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HOWDNTHIS GET TEN LIKES HELP

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

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hey no cussing

[@heena_bilal0]

who tf asked lmfao

[@mooncxtton7371]

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

[@shirleyh9800]

this is amazing

[@sanjaygairola9542]

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

[@chaotictuna]

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

[@bazooka3111]

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

[@saimashawkat]

Si am i

[@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

[@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

[@skankhunt-yl5pk]

Your way better than my teacher

[@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 ☺️

[@bhipcx6964]

thx man you helped my grade improve

[@rashmikukreja8154]

Thank u so much for the easy explanation...

[@James1239170]

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

[@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

[@Dime-.]

THANK U SO MUCH THIS HELPED ME SO MUCH

[@sean_kun8981]

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

[@opendatruth]

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

[@7_alxe]

Nice

[@ms.b4268]

The key to area is length times width

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Or length time breath

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

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thanks would recommend this to my friends !

[@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?

[@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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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

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Good luck gg

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

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no one asked

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Thank you for teaching me! ☺️💕👍🏻

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i can learn very fast from him

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

[@michaelzerr8248]

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

[@visual_minji]

you explain it so well! thank you!

[@midnightmoon336]

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

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did u ?

[@skywalkerkms]

Thanks dude really helped me in school

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He’s Bengali say Thomi Onek Posa.

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YOU SAVED MY LIFE I LOVE YOU

[@elmo9097]

Riley Young da fuq is rong wit u

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Ok!!???

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I’m watching dis bc I have homework:(

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sane

[@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 😂

[@hs7440]

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

[@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

[@meetusharma4717]

Thank you mr. khan! This is really helpful!

[@AadarshPandeyop]

*Mr sal

[@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

[@ranielbenedictroquetala5381]

tysm i had a test today

[@monkey_d_luffy12]

I understand in minutes wow nice teaching

[@mystickitty9273]

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

[@ananykakade]

Thanks helped me a lot

[@tamermostafa8286]

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

[@s.syphus]

Honestly, you are a life saver

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Man I wish he was my Teacher

[@sharonzhong805]

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

[@prof111]

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

[@anushkabhandari9508]

That looks perfect

[@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

[@fatemamustafa3646]

I still need more teaching .

[@ms.b4268]

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

[@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 TH-cam 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

[@fahadrashid1953]

you saved my life tomorrow i have a test

[@bigreddsgamereviews2215]

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

[@heena_bilal0]

who asked

[@yoonsunkim4411]

Thanks for helping

[@kainenyenke5736]

thanks a whole bunch

[@SkittleflakeKitty]

test tomorrow
*opens khan academy playlist*

[@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

[@mos4535]

YOU ARE AN ANGEL BRUV.

[@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

[@jesusrodelas1757]

thank you for teaching me

[@fantasticsammi5583]

i get it!!! yay! i was having trouble understanding perimeter and area in class so i thought maybe i can find a video to help me understand it more. And i found this video! it helped me so much! Thank you so much Khan academy!

[@heena_bilal0]

who asked tho

[@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

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keep this up

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keep this up

[@livingwellwithinmeans7219]

That was the best thing I ever saw

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Thank you for helping

[@natalieshrestha3003]

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

[@guadaluperico18]

It's only 1 year old

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I like it I appreciate it keep it up

[@originalseankelly6799]

Helpful!

[@alejandrajimenez4935]

You heló me So much thanks

[@maychen5665]

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

[@user-lo3gr1ci3i]

May Chen yes

[@splitzy1157]

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

[@stanceworks7995]

I enjoy Khan academy videos. I'm from Cape Town. This guy's voice is soo soothing and capturing. Thank you Khans academy

[@LightLock]

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

[@skankhunt-yl5pk]

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

[@notshipley6164]

Thank you

[@MANOJKUMAR-gc4hv]

Thanks you sir for explain us love from india

[@NTR-hp6le]

0.45 sounded like a man learning to count with the playback speed of 0.5x

[@tielcook6088]

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

[@mysticaladnan_1913]

Do you mean forever

[@Tatipadsecret]

This was hard until I saw this