I don't speak the language but I have a Portuguese Water Dog so I'll get her to translate.
It looks like we're after AC which is the hypotenuse of ADC
We need AD which is the leg of ADB, right angle D
[tex]2^2 + AD^2 = 10^2[/tex]
[tex]AD^2 = 100 -4 = 96[/tex]
[tex]AC^2 = AD^2 + CD^2 = 96 + (8+2)^2 = 196[/tex]
[tex] AC = \sqrt{196} = 14[/tex]
Choice (a)
