Question

I need so much help !

Answer 1

We have triangle with angle are 45°,45°,90° so in that geometric shape we have following dependents :
$a=s=4$

$a\sqrt{2} = \sqrt{32}$
$\sqrt{2}*x=4 \sqrt{2}$
$x=4$

That triangle is equilateral 
So the correct answer is  C

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