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Hectictar has given the edge length if the diagonal is across one face of the cube ...DB as shown below.......however.......if the diagonal is considered to be AB....we have...

AB  =  √[3s^2]

9  = √[3s^2]      square both sides

81  =  3 s^2      divide both sides by 3

27  =  s^2         take the square root of both sides

3√3  ft   =  s  ≈  5.19  ft.

Ok, that makes sense. Thanks

No it is not a website haha... it is a program that I think comes standard on Microsoft computers..it is at least on computers I've seen.

It's called " MS Paint " 

If you have a life span (which you do) then that is a range. <0-90> years

Woudld that be a website?

10003100

TheQuestion it's in top users

Thanks! I just made it using paint 

what did your name used to be? lol

btw had to make new account lost password to old one lols

where did u get the diagram dude? Thats awesome!

Hi Hectictar,

I have a some questions like that too :)

Sometimes I feel bad because I have asked a question and then I do not put as much effort into understanding as I need to.  But there is only so much time and there is always a new question to distract my attention.

So I do understand.

Still if you want me to explain more slowly I can do that.  :)

This techniqe was new to me but it is not that hard and it is a nice probablility technique to know :)

Let's just look at one face of this cube.

(Since it is a cube, all the faces are the exact same.)

The edge length is labeled "s".

Since the diagonal forms the hypotenuse of a right triangle,

and both legs are "s",

we can use the Pythagorean theorem to find s.

s² + s² = 9²

2s² = 81

s² = 40.5

s = \(+\sqrt{40.5} \approx 6.364 \text{ feet}\)

720.

188-100-41.08-30-3.99= 12.93 Pounds

but do you mean like a root or a polynomial, or are you confused on the layout of the calculater?

Oh, okay..I see..

And I haven't thoroughly looked at it yet.. 

It's been sitting on my watchlist because I keep meaning to but I just haven't quite had the motivation to yet...I will try to understand it and if I have a question about it I will ask...Thank you! 

The easiest way is just to divide :)

“One of our two solutions”

Now you are clamming credit for the Answer Man’s work.

Plagiarism: The practice of taking someone else's work or ideas and passing them off as one's own.

You practice quite often, but you are not very good at it.  You weren’t very good at embezzlement either. 

The best way is simply to divide 102 by 12, and get, as you said, 8.5.