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#26 2010-05-07 06:02:08
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Area problems Please Help!!
Thats correct to three decimal places.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#27 2010-05-07 06:18:01
- misheeru
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- Registered: 2010-02-18
- Posts: 4,594
Re: Area problems Please Help!!
Hmmm. This is starting to make more sense.
I'm a bit behind in my lessons. 
My current one is on Area of Segments but I wanted to wait till I got better at the Area of Sectors first...
Okay how does this look. Its another one from my homework.:
What is the area of a sector with radius 10" and measure of arc equal to 45°?
45/360 * 3.14 * 10 * 10
1/8 * 3.14 * 10 * 10
A = 39.25 in ^2?
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#28 2010-05-07 06:22:12
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Area problems Please Help!!
That is correct.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#29 2010-05-07 06:32:12
- misheeru
- Member
- Registered: 2010-02-18
- Posts: 4,594
Re: Area problems Please Help!!
Woah really?!?!? 
I can't believe that I actually get something for a change!!!!
Hopefully my luck will hold out. Okay so when we try to find the area of a segment, we have to find the area of the sector first?
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#30 2010-05-07 06:35:29
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Area problems Please Help!!
I do it with a formula.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#31 2010-05-07 06:39:53
- misheeru
- Member
- Registered: 2010-02-18
- Posts: 4,594
Re: Area problems Please Help!!
Okay well, what formula do you use then? Maybe urs is easier to understand then the way my lesson describes it. 
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#32 2010-05-07 06:46:01
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Area problems Please Help!!
First tell me how your lesson describes it. Take your time and give me one of your examples. If you can.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#33 2010-05-07 07:02:21
- misheeru
- Member
- Registered: 2010-02-18
- Posts: 4,594
Re: Area problems Please Help!!
Ok. They say to find the area of the sector first.
The model problem is:
Given a circle with a 6" radius, find the area of a segment that has a 60° arc.
60/360 * πr^2
1/6 * π(36)
1/6* 36 = 6π
Now, we must find the area of the triangle and subtract it from the area of the sector (6π).
The radius of the circle (6) is also the hypotenuse of our 30-60-90 triangle. The short side of our 30-60-90 triangle would, therefore, have a measure of 3 (since the short side is ½ the hypotenuse). We also know that the longer side of a 30-60-90 triangle has a measure equal to the shorter side times . Our height must, therefore, be √3.
Area = ½ (base)(height)
Area = ½ (6) 3√3
A= 9√3
Total Area of a Segment = 6π - 9√3
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#34 2010-05-07 07:08:22
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Area problems Please Help!!
How do you know that the short side is half the hypotenuse?
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#35 2010-05-07 07:14:42
- misheeru
- Member
- Registered: 2010-02-18
- Posts: 4,594
Re: Area problems Please Help!!
um.... I don't know! Isn't it always that way??
mybe this helps, this picture.
Last edited by misheeru (2010-05-07 07:16:29)
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#36 2010-05-07 07:17:12
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Area problems Please Help!!
Okay they didn't show you. They haven't given you any trig have they?
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#37 2010-05-07 07:22:16
- misheeru
- Member
- Registered: 2010-02-18
- Posts: 4,594
Re: Area problems Please Help!!
Trig...uh not really... I don't think.... but I remember reading somewhere that the short leg is supposed to 1/2 of somnething. I can go back and look if you'd like? It would only take a few minutes.
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#38 2010-05-07 07:26:38
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Area problems Please Help!!
Not necessary your answer is correct. Do it the way they want you to. Had you had a little trig you could use a much easier method than that. That will work though.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#39 2010-05-07 07:31:25
- misheeru
- Member
- Registered: 2010-02-18
- Posts: 4,594
Re: Area problems Please Help!!
Okay!. Thank you! Arigatou Gozaimasu! 
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#40 2010-05-07 07:34:11
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Area problems Please Help!!
Anata no kangei Is that correct, for your welcome?
or
Iie - no problem
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#41 2010-05-07 07:39:03
- misheeru
- Member
- Registered: 2010-02-18
- Posts: 4,594
Re: Area problems Please Help!!
Well I said thank you in more of a formal manner, so if wanted to be more formal back then Douita math would have been n best
And 'Iie' usually just means "no" so I think you supposed to say it twice.
And LOL it added the word "math" in there because it thought you cursed!
Last edited by misheeru (2010-05-07 07:50:59)
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#42 2010-05-07 07:42:54
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Area problems Please Help!!
I must have said something incredibly wrong, my translator is an idiot. Sorry, and please forgive me. The MIF filter is changing what we are typing.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#43 2010-05-07 07:45:08
- misheeru
- Member
- Registered: 2010-02-18
- Posts: 4,594
Re: Area problems Please Help!!
Lol no its fine. I'm still a learner so I wouldn't be surprised if I made a mistake myself.
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#44 2010-05-07 07:46:27
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Area problems Please Help!!
Yes, he said that and I didn't listen to him. Sorry again. I thought iye was no.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#45 2010-05-07 07:48:56
- misheeru
- Member
- Registered: 2010-02-18
- Posts: 4,594
Re: Area problems Please Help!!
Lol stop apologizing! Its fine!
And I'm sorry, but "Do itashi math" is really funny! XD
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#46 2010-05-07 07:50:11
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Area problems Please Help!!
Was it lewd? As then I will delete it.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#47 2010-05-07 07:52:18
- misheeru
- Member
- Registered: 2010-02-18
- Posts: 4,594
Re: Area problems Please Help!!
No it isn't it just thinks ur trying to say the "s" word. If you noticed I went back and spaced mine Differently so it wouldn't put "math" in there.
Aw man it worked when I hit "preview"!!! Darn it!
Lol I can't win with this thing!
Last edited by misheeru (2010-05-07 07:53:49)
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#48 2010-05-07 07:54:23
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Area problems Please Help!!
You were asking if I speak Japanese.
lie or ( iye)
Just a some words that is all.
I didn't notice that word in between the japanese words. I have removed it. Sorry, for missing that.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#49 2010-05-07 07:54:33
- jerry jackson
- Member
- Registered: 2010-03-04
- Posts: 3
Re: Area problems Please Help!!
Thats correct to three decimal places.
hai all i am new on mathisfunforum
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#50 2010-05-07 07:57:30
- misheeru
- Member
- Registered: 2010-02-18
- Posts: 4,594
Re: Area problems Please Help!!
Hi Jerry! Yeah that would have worked Bobbym. If you ever did end up going to japan the only thing you'd really need to know is "sumimasen eigo o hanasemasuka" which is "excuse me, do you speak english?"
Last edited by misheeru (2010-05-07 08:02:04)
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