Heron's formula | Perimeter, area, and volume | Geometry | Khan Academy

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Using Heron's Formula to determine the area of a triangle while only knowing the lengths of the sides
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[@gamja_YT]

At the last part where he does the square root of 18 time 9 times 7 times two, instead of the extra step with the 36 you can just multiply 2 and 9 which is also 18, then take out the the 18 and leave the 7 which is a shortcut-ish to getting 18 times the square root of 7.

[@duckface9573]

for people wondering about the last part where he did 18 and 7 squareroot, you have to find the squareroot of 7 first and multiply that with 18 to get the final answer :)

[@tysonm2525]

Thank you!

[@norwayte]

Good. Keep on going.

[@skdooman]

great video, its appreciated

[@yannaaguilar7367]

It's my exams tomorrow and this is part of it and my teacher did not teach us this so thank you so much !

[@sat1354]

Awesome explanation!!!! would you say that the Heron's formula is useful for any triangle problem? except the right triangles, of course?

[@thebattlefieldmaster1012]

thank you sooo much:)

[@alanbajpai8946]

A= 1/2×b×h= half of isosceles triangle

[@nicecoolstuff13579]

I love Heron's formula! :D THANKS FOR YOUR KINDNESS FREE LESSONS ONLINE OF THIS QUALITY ARE VERY RARE!!! YOU ARE AWESOME MR. SALMAN KHAN!!!! :D Super excited. :)

[@hightied580]

Thanks for the Video, and what program are you using?

[@cluelessking7168]

This video was very helpful thanks a lottt!!!!

[@betruetoyou22]

I LOVE YOU MAN - YOU'RE A LIFE SAVER

[@IraCruzLoveR31]

merci .. je comprends heron's formula . . : )

[@chaitanyab9436]

Thx mate rly helped me

[@PaulBatazii-bs5xt]

Thank you very much for the video, l was stuck on this question but now it's really simple after watching this video...👍👍👍👍

[@griftorifto2]

OMG I figured this out without the theorem on my own. Well it was off by 0.6~. That must have been down to my calculator rounding it off., then squaring the numbers threw it a little out of proportion. I love Maths! :) Might devise my own formula. If Im right.... BRB

[@WxvesVFX]

was it successful?

[@KkandLizProductions]

PRAISE YOU

[@kingsinghace9870]

So glad I found this vid!!!!!

[@mukeshtyagi1649]

thankfull vedio

[@aurorasephenson2184]

Thanks for the video

[@fire9132]

I'm surprised this isn't taught in schools

[@praveen18ify]

In wht r u teaching the black background. Can u say wht is that the name of the software.

[@JammyTom]

math is so weird i love it

[@abhisreehari6346]

Thanks sir

[@drevil37373]

this reoccurs in vectors.

[@betruetoyou22]

i love you me salman khan I LOVE YOU I LOVE YOU I LOVE YOU ! these videos are saving my life - if i get to uni it would be thanks to you

[@ninjajesus81]

For some stupid reason I was using the distribution properties and FOIL and coming up with these huge numbers and not getting the correct answer. Thanks for showing me I could just subtract them. I don't know why I didn't think of that.

[@srushtishetye5395]

it helped me a lot thank u soooo much😊😊

[@animepabu5526]

watching this for my coding formula. gotta make sure my codes right T_T and here i thought i was done with formulas like these LOL

[@waddles543]

Anyone else watching this cause they didnt listen in class?

[@maannsiii_]

Waddles

[@dododareal1218]

@@maannsiii_ psyduck

[@megamindbmgo1592]

Me

[@angryking7957]

Me

[@xynic]

Even if i did i would forget 6 seconds later

[@tianacampbell4880]

Awesome...

[@icecreamcake510]

thank u u just saved my life plz keep up the good work this is so helpful

[@davidbaxter2772]

This really helped...thnx man:)

[@CarlosLopez-ty3ql]

does the final answer have to be in square root or can you turn it into a whole number?

[@kathyayinisudeep4581]

Depends Some have roots as their answer and some don't I know ur not goona see this message after 6yrs ago

[@Goatfooted]

@@kathyayinisudeep4581 yeah a little late bud

[@samiatar686]

@@Goatfooted little?🤣🤣

[@Jillian364]

urgg studying i kinda got it

[@Tiaboot]

Thanks for the help!

[@bbbb-ki7kr]

I finally got it!

[@yashsallam9678]

thanks man i understood everything :)

[@stargarden2577]

16x/2 = 18sqrt7 to get height

[@isaac10231]

Why the hell isn't this in my textbook?!

[@j.e.r7971]

because the world and school hates us

[@isaac10231]

That comment is 3 years old... Lol.

[@airdstrikejr8326]

lol

[@eliseomarroquin3749]

true

[@j.e.r7971]

lmao but its true XD

[@3Y1P]

great, now i know how to do my homework.

[@whrobinson333]

Cheers man

[@savhepp5524]

I am enjoying watching this video, It’s scaring me. Much more easier to understand here than it did in class, Thanks so much.

[@kritikaasawa8105]

this is awesome u saved me man!!!!!!

[@wollypolly]

the 9 and the a look the same lol 2:46

[@barghbeth]

Thank you this really helped on an assignment. I spent 15 min trying to find the height of the triangle lol

[@jayham1970]

This is a great formula, thank you for sharing, but please slow down, actually show the mathematical steps, and not expect everyone [trying to understand what just happened] to understand what you just demonstrated. Please show all of the mathematical steps under the square root with a step by step. Without a good explanation, this is why so many students hate (and fail) in mathematics. (JMHO)

[@tusharhalder4480]

Anyone Watching this in 2020?

[@MuiYuDoTheLoo]

hi

[@TheShivanshmishra]

very good , keep it up salman '

[@randybandhu3287]

Great video but my brain is like a rock lol

[@tevinconstable7589]

That was complicated for a second there.

[@purplethic6721]

Anyone watching this in 2022 (12yrs old video) ✨✨ btw video was amazing

[@Monkeynet01]

5 now...

[@rea9554]

Its been 2 moths since the last comment lets change that

[@vinimini2694]

Omg! That was SO helpful! Ur way better than my school teacher and my home tutor! I understood everything👍🏻!!

[@grungysheik44]

it's "heron's..." probably because 'herons' all look alike

[@lilshawt3e23]

WHATTTT I didn't get the end bit? :S

[@naokibeaudettenagai8794]

hmmmm

[@eldonpan2250]

I like my algebra shaved

[@joaquinauzenne]

So is this to learn area of triangles that aren't right or?? I dont see the benefits....

[@phanuel6520]

Zentonic Online wow well whatvyou just said was pretty stupid

[@phanuel6520]

its if the triangle has no H or height

[@phanuel6520]

you need H in order to get the area BxA÷2 is the area of a basic triangle now if you don't have A or in this case H wich is the height you can't get the area because theres a missing measurement or factor so Herons Formula can get the area of triangle if it doesn't have H, if you didin't understand up to now your just stupid

[@phanuel6520]

Its amazing how you didn't understand its like the most basic side of geometry and triginometry

[@YozoraYue]

My teacher didn't teach me in Geometry.... now I am here to watch this video for ACT

[@raymondchen3605]

ai-yi-yi to complicated, try rewording it to make it easier

[@Cublex]

hairy algebra

[@Seventhx7]

can't you just multiply all the numbers inside the square root and get the whole number?

[@bobross3356]

that's what I was gonna say

[@michaeld8907]

yes but it wouldn't be simplified all the way if you left it that way

[@maannsiii_]

Khan ki mkc

[@Miitchyy]

Curses my math teacher's accent.

[@TadNathanielTobar]

This comment made me WANT to dislike this video.

[@MuiYuDoTheLoo]

hi