Math Is Fun Forum

misheeru

Member

Registered: 2010-02-18

Posts: 4,594

Re: Area problems Please Help!!

Yeah I drew is out. After dividing it, its a right triangle. So if I'm on the right track so far then the short side is 1.5 and hypoteneuse is 3 and the long side is 1.5√3?

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Of Moons, Birds and Monsters

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Area problems Please Help!!

right, get the area of that triangle

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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.

misheeru

Member

Registered: 2010-02-18

Posts: 4,594

Re: Area problems Please Help!!

Okay so is it: (1/2 )1.5(1.5√3)?

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Of Moons, Birds and Monsters

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Area problems Please Help!!

Yes, what do you get.

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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.

misheeru

Member

Registered: 2010-02-18

Posts: 4,594

Re: Area problems Please Help!!

... 3√3?

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Of Moons, Birds and Monsters

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Area problems Please Help!!

Nope!

There are 2 of these in the big triangle so:

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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.

misheeru

Member

Registered: 2010-02-18

Posts: 4,594

Re: Area problems Please Help!!

okay, you lost me there...

Last edited by misheeru (2010-05-18 11:19:19)

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Of Moons, Birds and Monsters

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Area problems Please Help!!

You mean in decimal? Let me give you a little tip. There is never any need to convert to decimal when you have fractions. I know you want to, but that is the answer. If you really need the decimal then.

one side is 1.5 that is 3/2 the others side is ( 3 / 2 ) √3 formula is  (1/2) b *h

So ( 1/ 2) 3/2 * ( 3 / 2 ) √3 = (9/8)√3 is the Area of the little triangle.

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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.

misheeru

Member

Registered: 2010-02-18

Posts: 4,594

Re: Area problems Please Help!!

Thank you! Cuz thats the answer I got! I was like noooo! what did I do wrong?!

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Of Moons, Birds and Monsters

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Area problems Please Help!!

Now there are 2 of them in the big triagle you should have drawn. so multiply by 2

---

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.

misheeru

Member

Registered: 2010-02-18

Posts: 4,594

Re: Area problems Please Help!!

Sorry missed you last post so multiply my answer by 2?

Okay so from there then we have to find the area of the sector?

Last edited by misheeru (2010-05-18 11:28:05)

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Of Moons, Birds and Monsters

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Area problems Please Help!!

What have you got for the big triangle? Now subtract it fron 1 / 6 of the Area of a circle.

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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.

misheeru

Member

Registered: 2010-02-18

Posts: 4,594

Re: Area problems Please Help!!

So the big triangle is (9/8)√3 times 2? then is that 18/16)√3? Or something like that?

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Of Moons, Birds and Monsters

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Area problems Please Help!!

Nope, Not (18/16) but (18 / 8)√3 = (9/4)√3

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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.

misheeru

Member

Registered: 2010-02-18

Posts: 4,594

Re: Area problems Please Help!!

oh okay I see what I did wrong there...

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Of Moons, Birds and Monsters

misheeru

Member

Registered: 2010-02-18

Posts: 4,594

Re: Area problems Please Help!!

Then do I find  the area of the circle or the sector?

Last edited by misheeru (2010-05-18 11:43:45)

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Of Moons, Birds and Monsters

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Area problems Please Help!!

What is 1/6 of the area of a circle?

A = π r^2, A = 9 π , 1/6 of that is (9/6)π = (3/2)π

Area of the segment

As =(3/2)π - (9/4)√3 and you are done!

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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.

misheeru

Member

Registered: 2010-02-18

Posts: 4,594

Re: Area problems Please Help!!

okay... Arigato! Sorry to keep you so long! Thank you for your time!

Last edited by misheeru (2010-05-18 11:47:54)

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Of Moons, Birds and Monsters

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Area problems Please Help!!

Your welcome! Try to remember what you did today.

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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.

misheeru

Member

Registered: 2010-02-18

Posts: 4,594

Re: Area problems Please Help!!

ohayou gozaimasu bobii sensei!

Sorry for the Delay, my comp was acting strange and I had to restart (and ended up brushing my teeth, too)

Okay so these area probs are a bit different and I don't know what to do with them.

Here is the problem: Find the area of the shaded sections.

*I'll go ahead upload some images for you, m'dear.

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Of Moons, Birds and Monsters

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Area problems Please Help!!

Hi misheeru;

This one is a little on the easy side , have you tried anything yourself?

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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.

misheeru

Member

Registered: 2010-02-18

Posts: 4,594

Re: Area problems Please Help!!

No, thats because I don't really know how to come about solving these. If its easy like you say, then if you tell me how to get started maybe I can do the rest.

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Of Moons, Birds and Monsters

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Area problems Please Help!!

How much of the Area of the whole circle are you interested in?

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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.

misheeru

Member

Registered: 2010-02-18

Posts: 4,594

Re: Area problems Please Help!!

All it wants me to do is to find the area of the shaded parts. They all say that and I have a ton of them!

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Of Moons, Birds and Monsters

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Area problems Please Help!!

How much of the area of the circle is in the unshaded part? Look at the angles.

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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.