Math Is Fun Forum

misheeru

Member

Registered: 2010-02-18

Posts: 4,594

Re: Area problems Please Help!!

Yeah, for the most part. This "Equation of a circle" thing is getting me a bit, though.

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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!!

Post your problems, show me where you are stuck.

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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 nevermind, I read back a bit and I am okay now!! Turns out they aren't asking much, and its not as complicated as I thought, so its making sense more.

Thank you though.

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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!!

Okay, if you say so. You could post what you have learned, someone else might benefit from it. If you feel up to it.

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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!!

Sure thing, give me a sec though, I am going to post some more in the other threads then do the dishes.

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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!!

Okay, post what you know, complete with any diagrams. With explanations and clean, neat work. Remember you are posting to someone else.

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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!!

Yeah I will keep that in mind when I do.

Um.... My mind is going blank..do you know  the formula for finding distance between two points on a graph? I can't remember how to do these...

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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!!

The distance in the xy plane between (x1, y1) and (x2, y2) is:

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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!!

Would you mind doing one with me? I have lots of these so some practice would be nice.

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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!!

http://www.mathsisfun.com/algebra/dista … oints.html

What is the distance from the origin to ( 10 , 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!!

Thanks for that link, i saved it to favorites in case I need it, later.

Anyway, it seems I'm having a hard time following this equation of a line stuff.

I'm supposed to indicate in standard form the equation of the line passing through the given points.
I'm supposed to use these points: R(3, 3), S(-6, -6)

I start out by finding the slope, right?

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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!!

There are two forms, point,point and point slope. Which do you need?

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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!!

They just want the equation, which I am working on figuring out. The example looks like this:

A(4, 1), B(5, 2)

And the answer is this:

X - Y = 3

I'm looking back now for a formula, so what do you see here?

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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!!

I use point slope the y = mx + b form.

Can you now get the slope?

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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!!

Actually, I see they want me to use (y2 - y1)/(x2 - x1) for slope. Should I just try yours instead, though?

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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!!

That is the same as mine. Fancy math term delta means difference. Difference is subtraction.

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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, sorry about that...

Either way I think the slope is 1, right?

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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, now you have y = 1 x + b. Know how to get b, the y intercept?

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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 not really. I didn't even know it was nessesary. Their thingy-muhjigger looks like this: y - y1 = m(x - x1)

Either way, continue if you please.

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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!!

That's the other form. You have the slope so

y - y1 = 1 ( x - x1) can you finish?

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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!!

I think so, in the example it says I can use either of the points given to me. I'll just use (3,3).

So y - 3 = 1(x - 3)?

Then go from there?

Last edited by misheeru (2010-06-10 18:57:24)

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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, clean up. Now show how you check that you are right.

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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 from here we need to simplify it...?

Wait, so then is it  y - 3 = x -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!!

Yep, see those -3's on both sides? Take care of them.

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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!!

Wouldn't they cancel eac hother out?

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Of Moons, Birds and Monsters