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TRIANGULAR maximum problem (1 Viewer)

MrBrightside

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sry dude, i keep coming across qs i can't do, because this ones asking about a triangle :S

does it use Pythagoras somewhere? I have a feeling it does.

View attachment 22443

thanks
 

YaMiTe

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A' = -x^2/[2(25-x^2)^1/2] + [(25-x^2)^1/2 ]/ 2 = 0
= -x^2+25-x^2 = 0
2x^2=25

x= root 12.5 (12.5)^1/2

Then sub x back into A.
 

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