Answer:
x = [tex]\sqrt{8 }[/tex] or [tex]2\sqrt{2}[/tex]
Step-by-step explanation:
given that the triangle is isosceles, meaning that there are two equal sides
we can set up the equation as
[tex]4^2 = a^2 + a^2 \\16 = 2a^2 \\8 = a^2 \\\sqrt{8} = a \\a = 2\sqrt{2}[/tex]
