A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
it looks long but im just explaining what i did and can someone please tell me where i went wrong???
PLEASE?
ok, a sector of a circle of radius 6 cm has an angle of 1.6 radians
find the area for the sector hence find the area of the segment
The problem is that i worked out the area which is 28.8 of the sector
i worked out the triangle and took it away from the area of the sector and ended up with 10.8 which is right but then here's the problem how do you use the formula of the area of the sector?
it 1/2x6^2xsin(1.6)=0.50258...
but that not what i got above i got 10.8 above :S
anonymous
 5 years ago
it looks long but im just explaining what i did and can someone please tell me where i went wrong??? PLEASE? ok, a sector of a circle of radius 6 cm has an angle of 1.6 radians find the area for the sector hence find the area of the segment The problem is that i worked out the area which is 28.8 of the sector i worked out the triangle and took it away from the area of the sector and ended up with 10.8 which is right but then here's the problem how do you use the formula of the area of the sector? it 1/2x6^2xsin(1.6)=0.50258... but that not what i got above i got 10.8 above :S

This Question is Closed

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1the area of a sector is the same as that of a circle; you just replace the angle measurement... 2pi r^2  = area circle 2 angle r^2  = area any part of a circle 2

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.11.8pi 6^2  = .9pi(36) = 32.4 pi 2

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1ack!!...forget the pi part lol

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so is the formula wrong then?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1dunno; but my inputs are dyslexic... 1.6 (36)  = area of sector 2

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0but thats a different answer :( so is 10.8 wrong then??

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1why are you removing the area of the triangle?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0to get the segment area and i looked at the mark scheme and 10.8 is right but theres a segemnt area formula and that doesnt work :(

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1so teh segment will be the arch looking section of the piece of pie right?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1the area of a trianlge is: r^2 sin(angle)  2

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1make sure you have your calculator set to radians tho

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sin?? isnt area of a traingle BxH/2???

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1it is; but this isnt the area of a right triangle

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1the area of any triangle is: base = radial arm = 6 height = radial arm *sin(a) = 6 sin(1.6) and /2 sooo... 36 sin(1.6)  = 18 sin(1.6) 2

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1the area of the tri is abt: 17.99

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0here is the diagram, if u need it

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.128.8 17.99  10.81

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1or maybe not..... is 1.2 larger than 90?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.01.2 lager than 90??? is this a trick qs?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.11.2 * 180  = 68.75 degrees right? pi

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yes, but now im lost where did you get these number fomr?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1trying to convert radians to degrees; radians normally have a pi in them so you multiply by 180/pi to get the angle.. pi 180  *  = 90 degrees 2 pi

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.112 180  *  = 216/pi = 68.75 10 pi

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1since the angle is acute; we can assume that our method was correct;

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1so I get 10.81 whats the answer you get?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1then the area of the segment should be 10.8 :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0thank you soo much for explaining this :) if i could i would have wanted to give you some more medals but i can only give you one :S

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1'sok; you enjoy yourself now :) i got class starting soon
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.