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# what is the perimeter of the shape? (in term of x, or if

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Director
Joined: 23 Sep 2007
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what is the perimeter of the shape? (in term of x, or if [#permalink]

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27 Dec 2007, 21:58
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what is the perimeter of the shape? (in term of x, or if possible, a concrete number)

Lets call the slant/diagonal side C.

I don't remember the exact format of the answer, but I could not simplify all the squareroots to match it.

I got C^2 = x^2 + (x√(3) - 8) (x√(3) - 8)

What is the simplest form of C and what is the perimeter? Can someone find/verify the perimeter.
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Director
Joined: 23 Sep 2007
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28 Dec 2007, 00:43
walker wrote:
I got P=20+4√3. Is it correct?

I don't know the answer, I just remember that the choices were of longer forms.

can you post your steps so I can compare with mine?

I have

CD = 8

AB = X√3

AC = 2X

ED = (X√3) - 8

AE = X
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CEO
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28 Dec 2007, 01:16
Expert's post
You are right.

AB=√(x²+(√3*x-8)²)
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