18.03.2015, 02:02
Quote:
I am not sure about your method Milito. Accoreing to me we can try two methods one is pythagoras and the other is the area method unless he specifies what chapter's sum it is we cannot post his required solution this means lack of data.
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Anyways, he figured out another ecuation (Area of a square)
(18-a)(12-a)=a^2
That leads usto the same result I gave using similarity of triangles.