Surface Area of a Cone | Math with Mr. J

[@MathwithMrJ]

✅ Thanks so much for watching! ✌️✌️✌️ ✅ One quick note about the step where the radius and slant height are plugged into the formula... I do not have an "x" to represent multiplication in between π and 4 squared for the area of the base like I do for the lateral area (πx4x13). This is okay because π next to a number means to multiply.

[@abdelhamidhamdan6586]

It took my math teacher a hole week and I didn’t understand it and a random guy on KZbin expanded it and I understand it

[@qianqian-g9j]

Whole

[@TheMemi2007]

😂

[@tarushshrivastava3232]

Sir I am a student from India, Thank you for the video

[@ramseenamujeeb6118]

I am also from india

[@TeacherSatya]

I am also from India and a Teacher of Maths :)

[@lorenceolshansky8180]

I am in America and am learning math

[@marishud6377]

How is being from India have to do with anything

[@Da_SAVAGE]

No one asked you to respond

[@blue_editzz]

You helped me a lot with my exams, you deserve more likes sir

[@MathwithMrJ]

Glad to hear that!

[@dipikaanand6769]

True

[@memohamed1192]

Yes

[@dimensionknightgaming4164]

I agree 💯 percent

[@dimensionknightgaming4164]

He's teaching more then my teacher

[@havehope646]

Thank you so much Mr J

[@anapopadich1480]

Thank you! I have a math test tomorrow and wanted to know how to do this just in case. It was way easier than I thought, all I have to do is remember the formula.

[@candyclass101]

agreed

[@11037_kuwata]

just remember to write the formula when u do a question I do it every time cuz it drills the formula into ur head it makes it easier fr

[@Kpop_unnies]

Well test is easy BUT I HAVE AN OCTOBER EXAM NAUR

[@DaveSampel-cb9xi]

Same!

[@nomertibi2503]

thank you sir 🎉🎉🎉🎉🎉

[@lightbrickstudiosextra3570]

THANKS FOR SAVING MY LIFE

[@dipikaanand6769]

Best math channel on KZbin

[@aksharaarrepu8780]

yes the best!

[@gathgaming3279]

thank you this helps a lot to me

[@StrxberrieKisses16]

Thank you so much for teaching me!! Now I’m ready for my math final! 👍😄

[@yanyanreyes2457]

Sir Thank you for the lesson this is really helpful for me

[@TeacherSatya]

This was a very nicely done video, keep it up :)

[@zbeedy21]

Thanks so much!

[@Audreyytt]

Omg i have a test todayy hopefully i can remember thjs

[@toastedgamerwastaken5361]

tysm mr j you are a LIFE SAVER

[@ElenaDonahue]

Thanks I have my HSAT on Wednesday and I was reviewing and this really helped

[@Umar.78621]

Iam student from India and I thank you for a clear explanation

[@Marshimallu]

Thank you for this!! I needed this because my final exams are so close,this helped a lot!

[@petermugambor6333]

Teacher I came from Rwanda thanks ❤

[@kailahsparrow6889]

Thank you soooo much I have such a hard time with geometry you made it seem so much easier

[@rikasoft]

Thanks, my teacher taut us a really complicated way where you have to find the angle area so it was really complicated

[@DeaTh-hp9eo]

I needed this for my grade 8 exam thanks

[@WillieMambu]

Thank you mr i am a student from papua new guinea ❤

[@cooperdorta5119]

dude this helped me not fail my maths exam. thanks, what a nice guy

[@cooperdorta5119]

i'm kidding but still a great vid man

[@abudihamdan8299]

@@cooperdorta5119 bro 💀

[@fezzahparvaiz6705]

thanks a lot it will help in my end of year assessment

[@chidinmauzoechi4751]

Wow this really helped thanks so much

[@Monkeh9]

W teacher. my teacher took 3 days of complicated classwork and lectures just to learn the same thing but better in 5 mins

[@ryxltms]

Thank sir!

[@yanyanulan]

Hey Mr. J! Can you please post a video about the surface area of sphere? Thanks so much for helping meeee ❤😊

[@Child_of_God_23]

Idk if he posted a video on it, but the surface area of a sphere is 4πr². Basically, the circle they draw in the middle of a sphere, you just find the area of that circle and multiply it by 4, hope that helps if you still needed it

[@yanyanulan]

@@Child_of_God_23 oh yeah. Thanks for helping :)

[@Imnoa710]

W teacher now I can ace my test❤

[@guruvandananand5426]

Thanks 😊

[@garyjohnson2635]

Great information for the surface area It really helped ! Btw when is your face reveal ?😀

[@dipikaanand6769]

I think his bitmoji IS his face reveal.

[@aksharaarrepu8780]

@@dipikaanand6769 ha ha😂

[@OnyinyeChukwujekwu]

❤❤ thanks so much

[@singh2702]

Instead of unravelling the cone you could just take length( which is the square root of height squared plus radius squared ) and make that the upper bound , then along that length you can get each height if you calculate the angle. So the integral will be xsin(angle) from 0-L , then multiplied by 2pi and added to area of base.

[@eyegrr8657]

Politely, I think formulas like these is why mr j makes such videos...

[@judithaachieng6763]

Can you do a video for more explanation?

[@adonsnip4224]

Dude your a big help you were better than chatgpt

[@fatimahelsakka]

Say I agree if you think Mr J has a brain of mathematics and very smart well I agree

[@wwilburw]

Is this for in and out what will the calculation be for inside and outside or is it times 2

[@shaniahunter2775]

Can you plz make a vid about profit and loss

[@ahavamikyas6416]

My God bless you! 😮

[@chadfoxnen6039]

im only watching these for the fomulas but thank you

[@glocku373]

Thank you so much ! Idk why my maths reader made the steps way more complicated than it should

[@LovelyJuly]

Exactly

[@wirthbrothers7807]

and realy nice videos it help everyone

[@lebucheron9815]

Nicely done. One improvement would be to write what 's' represents on the cone.

[@sakshimehra1015]

Thank you this really helped my fear of middle school

[@mercylinebwonda144]

Please sir what's the difference btwn surface area and area coz am working on finding the area

[@Jvck_Edits1]

You would use the area on a 2d shape and you would use surface area on 3d shape. Hope this helped

[@fatimahelsakka]

Quick math question how many hundreds go in the number of subscribers Mr J has

[@DanushkaBollegala]

How is the Pi r l part derived?

[@fish7500]

Hey are you sure your final answer is right cuz 68x3.14 is 213.52

[@monale5637]

Yeah, but he used the "not rounded" version of pi which is 3.1416 which gives you 213.6288 or 213.63

[@fish7500]

@@monale5637ohok

[@PauleenBaluca-i5d]

sir i want to know how did you get the answer 213.63? can you explain it for me? did it will round off to the nearest hundredths 214 or not?

[@jessamaelopez7853]

Surface area of spehere next?

[@TeacherSatya]

SA of Sphere... very easy :)

[@memohamed1192]

Flexing

[@thomas-907.9]

What do we do if we only have the height and radius

[@Smiling_on]

Math test in 5 mins thank you

[@aisuaisu1923]

I hate school in Canada 😭

[@TeacherSatya]

Why is that, as a Teacher myself teaching with many Canadian Teachers, im curious !

[@polycultural6002]

mee too

[@sleepstation7443]

Isn’t it summer tho?

[@sosawq7768]

🤣🤣🤣🤣

[@diluc1556]

No some ppl still have school

[@someguy1hi665]

@@diluc1556 ya I'm doing homeschool so i might have summer homeschool :(

[@dailyfnleaks6480]

First!

[@memohamed1192]

N8ce

[@watermelonidk]

Hm. Two people first. Thats nice.

[@altaccount7433]

bruh

[@altheadejucos1557]

What happens instead of a radius its a diameter

[@Hanin.17]

I want to find S if L is unreliable how?

[@GDVO11664]

The lateral area is a shape of a slice of pizza

[@AteVadjj]

3.14 × radius × (h+r)

[@cdramafan9269]

3.14×68=213.52

[@ngadde9365]

I'm in 4th grade i know area and perimeter

[@ngadde9365]

I almost 4th

[@dipikaanand6769]

And? I'm in 5th grade but is doing 7th grade math right now.

[@dipikaanand6769]

Also the area and perimeter of which 2d shape?

[@memohamed1192]

Ayyo im in 5 but doin 7 grade math tooo

[@AtelierMoulineaux]

Im in 6th grade

[@jinsenshu1129]

My test is tomorrow 💀 its 12:48 am Rn

[@Cal32_]

Did you pass your test?

[@jinsenshu1129]

@@Cal32_ I did 😭

[@Cal32_]

Wow great! was it hard?

[@dhdjdhjdhsj4004]

Mr.J I think I have a crush on you

[@phycoeclipse2125]

AYO🤨🤨🤨🤨

[@moonkat1693]

🤔

[@Yadjiyuo]

Please correct me if I were wrong, but I think the answer is 213.52 . . .

[@orishiachetty8959]

sir please help with sum You and 5 friends saved money for 2 years to go to the Kruger National Park.

[@ezhilarasikrishnan5408]

i think he multiply 68* 3.14159

[@silentanimator69420]

When you said "PI rs", I thought you said IRS. 💀💀

[@roxxanncampos418]

😂

[@BeboyCordero]

Anything I do but I still don't understand my FUCKING lessons

[@joanjohnson6388]

Don't understand

[@Rhehanna_Vloug]

Hindi ko gets😢

[@jaamat-e-islami]

Free Palastine!❤🇵🇸

[@Ay_kay_forty_seven]

Thank you so much!!