Respuesta :
since it is an isosceles triangle(a triangle that has 2 angles the exact same) you would make n the same length as 8 then use the Pythagorean therom and solve. the answer is the square root of 128
[tex]Answer: \\ \sin(45°) = \frac{8}{m} \\ \Leftrightarrow \frac{1}{ \sqrt{2} } = \frac{8}{m} \Leftrightarrow m = 8 \sqrt{2} [/tex]