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!
@tchanimations82374 ай бұрын
cheers looking to boost my grades to a solid 5 with this.
@kennethbigboi8913 Жыл бұрын
Thanks for the review!
@happyminds5271 Жыл бұрын
this video saved my grades. thank you
@Pgee20232 ай бұрын
Very useful Sir
@user-lz4oo7ce2j7 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-ek1us4 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-l6d14 күн бұрын
Correction sir:"it's supposed to be 11.51
@juliusayewa33713 ай бұрын
How did you get 36.52
@khokhartradingcompany45789 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🎉
@murtaza86749 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-op1po8 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-jq1iz4vx9u10 ай бұрын
No the exact answer is 11.51😩❤️ But nice try🌍
@studyyes8119 Жыл бұрын
It's 9th standard question sir
@daddyprime598020 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