Math Is Fun Forum
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#151 2014-12-08 05:44:53
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Teach David
Yes, just enter x = 2 and then after that y = 6 as Agnishom suggests.
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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#152 2014-12-08 05:47:08
- David
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- From: Bumpkinland
- Registered: 2014-04-23
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Re: Teach David
Now, it looks like this :
His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.
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#153 2014-12-08 05:49:04
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Teach David
I am sorry, it is y = 2 and x = 6, so please erase those lines and enter the new two.
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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#154 2014-12-08 05:53:21
- David
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- From: Bumpkinland
- Registered: 2014-04-23
- Posts: 3,164
Re: Teach David
Looks better now.
His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.
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#155 2014-12-08 05:58:34
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Teach David
Very good, you learn fast, Now at the intersection of the two perpendicular lines put a point.
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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#156 2014-12-08 06:02:09
- David
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- From: Bumpkinland
- Registered: 2014-04-23
- Posts: 3,164
Re: Teach David
Okay.
His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.
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#157 2014-12-08 06:04:24
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Teach David
Notice the the 3 points form a right triangle. Use the polygon tool and connect all three points and a triangle will form.
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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#158 2014-12-08 06:06:15
Re: Teach David
Hi Chris;
Can you guess using your geometry knowledge the lengths of the legs of the right triangle?
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
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#159 2014-12-08 06:09:11
- David
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- Posts: 3,164
Re: Teach David
3 and 5
His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.
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#160 2014-12-08 06:12:00
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Teach David
That is correct, notice that the distance between the two points we want is the hypotenuse of the right triangle. Know how to find 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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#161 2014-12-08 06:14:23
- David
- Member
- From: Bumpkinland
- Registered: 2014-04-23
- Posts: 3,164
Re: Teach David
c^2 = 34
Last edited by David (2014-12-08 06:15:08)
His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.
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#162 2014-12-08 06:15:36
Re: Teach David
You mean 34
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
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#163 2014-12-08 06:16:35
- David
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Re: Teach David
Yes. Square root 34. I got the answer @ 5.8309518948453004709 thought M.
His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.
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#164 2014-12-08 06:16:46
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Teach David
That is correct but did you draw the triangle before you did the algebra?
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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#165 2014-12-08 06:17:42
- David
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- From: Bumpkinland
- Registered: 2014-04-23
- Posts: 3,164
Re: Teach David
I already did draw the triangle.
His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.
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#166 2014-12-08 06:18:20
Re: Teach David
Yes, he did it in his head.
Suppose you have two points (x1,y1) and (x2,y2).
Do you agree that the vertical distance between them is |y2-y1| and the horizontal distance between them is |x2 - x1|?
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
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#167 2014-12-08 06:18:57
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Teach David
Just for your information look in the algebra pane in gebra and you see that answer done for you.
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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#168 2014-12-08 06:21:44
- David
- Member
- From: Bumpkinland
- Registered: 2014-04-23
- Posts: 3,164
Re: Teach David
Oh I see. This is some note I did about the distance formula. 
His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.
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#169 2014-12-08 06:24:11
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Teach David
So what do you need?
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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#170 2014-12-08 06:24:45
- David
- Member
- From: Bumpkinland
- Registered: 2014-04-23
- Posts: 3,164
Re: Teach David
I need this in M. And what are we suppose to do in Gebra now? Sorry about the thing being full size O.O
Last edited by David (2014-12-08 06:25:12)
His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.
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#171 2014-12-08 06:26:53
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Teach David
If you have the triangle then the answer is already computed for you in gebra.
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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#172 2014-12-08 06:27:48
- David
- Member
- From: Bumpkinland
- Registered: 2014-04-23
- Posts: 3,164
Re: Teach David
How should we do this in M?
His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.
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#173 2014-12-08 06:29:32
Re: Teach David
Distance[a_,b_] := Sqrt[(a[[1]]-b[[1]])^2 + (a[[2]]-b[[2]])^2]
Last edited by Agnishom (2014-12-08 06:48:28)
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
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#174 2014-12-08 06:30:55
- David
- Member
- From: Bumpkinland
- Registered: 2014-04-23
- Posts: 3,164
Re: Teach David
So... Now it becomes some sort of function?
His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.
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#175 2014-12-08 06:30:55
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Teach David
Yes, you right up a little function as he has done. You always should do this.
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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