How to solve this math problem?

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1

<p>I seem to be able to solve the problem but my answer ins't amongst the multiple choices.
<a href="http://i27.photobucket.com/albums/c188/mngharry/examdude.jpg%5B/url%5D"&gt;http://i27.photobucket.com/albums/c188/mngharry/examdude.jpg&lt;/a>
My answer is
5+sqrt(12.5)
Could anyone help me out with this one?
By the way, are the questions on Examdude Collegeboard questions?
Thanks!</p>

2

<p>5+sqrt(12.5) is the answer.Stop wasting your time with this site</p>

3

<p>Well, I’ll show you how to solve it. Firstly you could find the measures of ABD. Using Pitagoream Theorem you have: (13x)^2=(12x)^2 +AD^2 . Hence AD = 5x. According to the problem you have that the perimeter of ABD is 15 = 13x+12x+5x = 30x
Then x=1/2. Now, look triangle ADC. Angle ADC is right and angle CDA = 45 degrees. So ADC is isosceless right-angled triangle. So AD=CD=5.1/2 = 2,5 and using Pitagorean theorem AC= sqrt(2).sqrt(6.25)=sqrt2. 2,5 . So the perimeter of triangle ACD is 2,5+2,5+2,5.sqrt(2) = 5+sqrt(12.5). So there is a mistake in the answers.</p>