Question

De acordo com a figura abaixo, o valor x é: *

6 pontos



2

1

-2

3

-1

​

Answer 1

$\Large\boxed{\begin{array}{l}\underline{\rm observe~a~figura~que~anexei}\\\sf (4\sqrt{5})^2=a^2+4^2\\\sf 80=a^2+16\\\sf a^2=80-16\\\sf a^2=64\\\sf a=\sqrt{64}\\\sf a=8\\\sf 4^2=x\cdot a\\\sf 16=8x\\\sf x=\dfrac{16}{8}\\\sf x=2\end{array}}$