Area and Perimeter

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Area of rectangles and triangles. Perimeter of rectangles.

Khan Academy

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Ok so Sal made a mistake lets move on. Sal you rock very helpful👍

dreamlover

Thanks for catching that. Made an annotation to reflect the clearly boneheaded mistake.

khanacademy

I can't wait for history too. I have learned so much from these videos. I feel like I am getting a college education for nothing. Thank you Sal, you are a true teacher.

Paxious

Thank you soo much I missed 3 of my classes and had to catch up this is the only person who help me

Mrimtiredzzz

Everyone corrected sal is like when the teacher makes a mistake in class and all the set 6 students start correcting them lmao

nrfimpulse

I will be sharing your videos with my 4th grader who is struggling in math. Thank you!!

susano

i freaking love your job & for helping me on my homework!THANK YOU, TEACHER!!!

AgaveRox

8x4 = 32 lol, you tought me more about areas than my teacher in 4 lessons! Cheers

meijacks

The 36 threw me off, although, I got the concept. Thank you very much!

dagon

Thanx so much I now understand your the best and now I'm passing my

thomashinds

God bless you for helping kids all over the world <3

dangelo

Sal, i can not thank you enough. All your math videos have been key in getting my 3rd grade IQ *ss back up to speed on things. Thanks again!

swiftsig

"Thank you this really helped me."

jasonriggs

Look at the math you did when you did 8+8+8+8="36"

naskensei

u helped me a lot ur videos really made me understand maths seriously...i was a dummy in maths nd frm ur help now i am a genius at it thank

shreyshantanu

It helped me with math review for my test thanxs

alierdos

@khanacademy forgive me, but with the last triangle, is it really still just 1/2 base times height? if that altitude you drew were actually a part of the triangle, then it would be 1/2 base times height, but if the altitude were part of the triangle, the triangle would've been considerably bigger.

idster

How do you write perfectly with a computer mouse? Or at least I think you do

laurengallery

8+8+8+8=32 that means 8 multiply by 4= 32 not 36 u are wrong

voltsworld

Than you Your video helped me with homework

OfficialMichaelMagi

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