Respuesta :
the picture in the attached figure
we know that
area of the triangle is equal to
[tex] A=(b*h)/2 [/tex]
in this problem
A=47 in²
b=x
h=x
so
[tex]47=x*x/2 \\ x^{2} =94 \\ x= \sqrt{94} \\ x=9.69 in \\ x=9.7in[/tex]
therefore
the answer is
x=9.7 in