Question 1145479
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Let x be the side length of any of the two remaining sides.


    These sides are of equal lengths, since the triangle is isosceles.


Then


    x^2 + x^2 = 4^2   (Pythagorean theorem)


    2x^2      = 16

     x^2      = 16/2 = 8

     x              = {{{sqrt(8)}}} = {{{2*sqrt(2)}}}.      <U>ANSWER</U>
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