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#26 2013-09-25 03:19:08

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,335

Re: Review

hi

See below for my graph.  What did you get?

Bob

Good news about the other work.

View Image: demha14.gif

You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#27 2013-09-25 03:24:13

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,233

Re: Review

Hi;

Congratulations for the 10.

For that problem I would not choose F.

View Image: 2013-09-25_081944.gif

In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#28 2013-09-25 03:25:54

demha
Member
Registered: 2012-11-25
Posts: 184

Re: Review

Hi Bob,
Now seeing your image, I would go with D. But wouldn't it be considered as 4 right triangles that meet at a right angle?


"The thing about quotes on the Internet is you cannot confirm their validity"
~Abraham Lincoln

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#29 2013-09-25 03:28:06

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,233

Re: Review

If you counted the exterior angles too. That is not one of the choices.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#30 2013-09-25 03:58:34

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,335

Re: Review

hi demha,

I think you need to forget completely about the earlier question, where the answer was a rhombus.  Start afresh with the four points.

If you plot them, look at the result and then join up, you get a rhombus.  But I don't think that is what they expect you to do.  I think I've met a similar Comp H question before like this.  They expect you to join point one to point two, two to point three, three to point four, and finally back to point one again.  If you do it like that you don't get a rhombus at all.  You get what .... ????

The question doesn't make this clear but if rhombus was marked wrong then I recommend you go with ........  you tell me.

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#31 2013-09-25 11:11:48

demha
Member
Registered: 2012-11-25
Posts: 184

Re: Review

It looks like a tall diamond. If cut in half, it can make two triangles.


"The thing about quotes on the Internet is you cannot confirm their validity"
~Abraham Lincoln

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#32 2013-09-25 19:40:33

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,335

Re: Review

Calling it a tall diamond is just another way of saying rhombus.  You are seeing lines that are not there. The definition of a rhombus requires it to have four sides.  What you have does NOT have four sides.

http://www.mathsisfun.com/definitions/rhombus.html

Earlier you said you would try answer D.  That is what I would choose.

Bob

Last edited by bob bundy (2013-09-25 19:41:50)


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#33 2013-09-26 01:54:30

demha
Member
Registered: 2012-11-25
Posts: 184

Re: Review

Alright so I sent in the my revision and got everything correct. Thanks all smile

I have another lesson I need help with. Would it be better to post here or make a new topic?


"The thing about quotes on the Internet is you cannot confirm their validity"
~Abraham Lincoln

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#34 2013-09-26 03:41:54

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,233

Re: Review

New topic is best.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#35 2013-09-26 03:42:40

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,335

Re: Review

Great news, well done!

Up to you where you post.  I'll find it.

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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