Finding the Perimeter of a Sector

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Finding the Perimeter of a Sector | Maths GCSE

Рет қаралды 142,347

revisionboost

Күн бұрын

Пікірлер: 55

@revisionboost 11 ай бұрын

The best way to revise: www.revisionboost.com/gcse-maths/

@Combat_withIsaac Жыл бұрын

Thanks bro 🙏 I needed this!

@vidhaanshah9861 Жыл бұрын

Use S=r * theta(strictly in radians) to find length of arc. And perimeter of sector by 2r + S

@revisionboost Жыл бұрын

That works too!

@Andyg2g Жыл бұрын

That’s literally what he did.

@sadikmd.965 Жыл бұрын

Thanks for 2r+S

@Seungberrysmine Жыл бұрын

damn might need this

@Andrea-jy6ft Жыл бұрын

Like the approach. I would have converted 55 to radians being 11pi/36 then multiply that by the radius to find the arc length = 132pi/36. Reduce to 11pi/3 then add 24. So 11pi/3 + 24 in terms of pi

@marioalb9726 Жыл бұрын

The perimeter of a perimetral sector is: P = α x R Easy, you don't need to calculate the perimeter of the entire circle Adjusting the unit of the angle: α = 55° x π/180° = 0,96 rad. Perimeter: P = α x R = 0,96 x 12cm P = 11,52 cm Perimeter of the angular sector is: P' = 11,52 + 12x2 = 35,52 cm

@junaidulislam1212 Жыл бұрын

Thank you

@revisionboost Жыл бұрын

No problem!

@tchanimations8237 4 ай бұрын

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@kennethbigboi8913 Жыл бұрын

Thanks for the review!

@happyminds5271 Жыл бұрын

this video saved my grades. thank you

@Pgee2023 2 ай бұрын

Very useful Sir

@user-lz4oo7ce2j 7 ай бұрын

Thank you It's so helpful for me

@sadikmd.965 Жыл бұрын

Thanks sir

@thuntiacuthan5261 Жыл бұрын

Good !!

@sivakumarshaaruhan Жыл бұрын

very helpful thanks

@timeonly1401 Жыл бұрын

Good explanation of how to find arclength sub tended by a central angle. Now, my pet peeve... Once you found the arclength = 11.52 cm... you then added twice the radius and wrote = 35.52 cm. You should've written perimeter or P = 35.52 cm. The string of equals signs ( = ... = ... = ... ) is true only when EVERYTHING is equal.

@ccbgaming6994 Жыл бұрын

He only did that because he was talking in the video, it’s not like he’s writing a research paper.

@timeonly1401 Жыл бұрын

@@ccbgaming6994 I get that, but here are a few points to counter: (1) Correct usage of the '=' is the kind of habit that should be automatic, like copying PERFECTLY the unworked-on parts of an expression from one line/step to the next. (2) There should always be a small part of your brain to watch what you're doing, to catch the mistakes -- simply copying errors, mis-reading of symbols, adding extraneous things not there, etc.-- so errors get caught right away, and not 5 step further along. (3) This is a KZfaq video the OP posted, which means that this is NOT a live broadcast, which means that he could've edited it, or even just redo it. This being a short, it's not as if he has to edit or redo a 15- or 35-min. video...

@ccbgaming6994 Жыл бұрын

@@timeonly1401 A few points to counter? I'm not trying to start an argument here ok. I think you're looking at this with a little too much technicality. If this was without audio then sure, he should be super formal with everything he writes. But this is a video. It's fine to write the equals sign like that because he says "the overall perimeter equals..." And I think it's obvious that 11.52 does not equal 35.52 I agree with you with all of those things, but seriously, no one is gonna care about a tiny detail like that in a youtube video

@giuseppesurace1048 Жыл бұрын

11,52

@NasirKhan-ek1us 4 ай бұрын

are you allowed to use a calculator in these type of questions?

@myfatherhanmaiah3810 Жыл бұрын

Super ❤️ explain TQ

@revisionboost Жыл бұрын

Thanks!

@lillye.h1899 Жыл бұрын

Wow I didn't know

@MT-vy1xs Жыл бұрын

Where does the 55 come from again?

@anyaaa868 Жыл бұрын

its the angle of the sector

@anyaaa868 Жыл бұрын

its the angle of the sector

@MorganNamo-l6d 14 күн бұрын

Correction sir:"it's supposed to be 11.51

@juliusayewa3371 3 ай бұрын

How did you get 36.52

@khokhartradingcompany4578 9 ай бұрын

It might be wrong I don't know in my opinion cuz 360°-55/360°×2π×12+12+12 the perimeter of a sector is answer= 372.4 is maybe

@yikofficialo6724 Жыл бұрын

10:00

@user-bp2gv6wh3p Жыл бұрын

I got it now🎉

@murtaza8674 9 ай бұрын

I don't have the angle so what do I do

@chessandmathguy Жыл бұрын

Wish you had found the exact answer 🙂

@Waterhiyouhey Жыл бұрын

It's 55 ---- pi + 24 15

@randomperson-op1po 8 ай бұрын

how did you get the 11.52 cm?

@僕 Жыл бұрын

i learnt this in 8th grade

@saimir7758 Жыл бұрын

This was used by euclide to calculate thé circumference of the earth 🤓

@janiferraheel2513 Жыл бұрын

I didn't get last part

@spaghetti4157 Жыл бұрын

I couldn't understand this sum

@piusetta2381 Жыл бұрын

How is it 35.5 again?

@doortheexplorer769 Жыл бұрын

Name Minecraft 1.20 dunes and ruins

@kralickomut3148 Жыл бұрын

Please use X only for variables..... its really destroying me seeing that

@ccbgaming6994 Жыл бұрын

This video might be for those who use the cross symbol for multiplication

@starboypluto Жыл бұрын

Later on in calculus you have to use the cross in certain situations

@arec68 Жыл бұрын

piszesz bardzo niechlujnie i niekonsekwentnie - symbol mnożenia u Ciebie wygląda jak litera x, poza tym raz go używasz a innym razem nie

@user-jq1iz4vx9u 10 ай бұрын

No the exact answer is 11.51😩❤️ But nice try🌍

@studyyes8119 Жыл бұрын

It's 9th standard question sir

@daddyprime5980 20 күн бұрын

Wwww😢😢😂😂😂❤❤❤❤

@tamirerez2547 Жыл бұрын

You are probably the only one who could read 55° Very sloppy handwriting. Not a proper way to teach math. Anyway, the explanation was good.

@ccbgaming6994 Жыл бұрын

Stuff like this don’t add any value to the comments section