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## #1 2007-02-13 10:45:39

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

### Question about icosceles triangles

This question was originally posted in an existing topic. It has been moved to not clutter up the other topic.

toppimp92 wrote:

how would you do this? i don't know how?

please help me

Why did the vector cross the road?
It wanted to be normal.

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## #2 2007-02-13 14:53:45

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,588

### Re: Question about icosceles triangles

Can make out a little bit.
This might be a start to understanding the question.
Click on image to enlarge if not already.

igloo myrtilles fourmis

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## #3 2007-02-13 14:57:38

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,588

### Re: Question about icosceles triangles

Oh!! I got a bigger picture of it!!
http://img171.imageshack.us/img171/6977 … oofzt7.png

igloo myrtilles fourmis

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## #4 2007-02-13 15:14:23

kylekatarn
Member
Registered: 2005-07-24
Posts: 445

### Re: Question about icosceles triangles

John, it would help understanding the problem if you named the vertices of both triangles  A,B,C and D in the picture

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## #5 2007-02-13 16:16:05

George,Y
Member
Registered: 2006-03-12
Posts: 1,320

### Re: Question about icosceles triangles

<bad=<bac+<cad
<bcd=<bca+<acd
<bac=<bca, <cad=<acd

X'(y-Xβ)=0

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