Question

Calcule o valor de x no triângulo abaixo

Answer 1

$\Large\boxed{\begin{array}{l}\sf 16\longrightarrow cateto\\\sf 18\longrightarrow hipotenusa\\\sf x\longrightarrow projec_{\!\!,}\tilde ao\\\sf cateto^2=hipotenusa\cdot projec_{\!\!,}\tilde ao\\\sf 16^2=18\cdot x\\\sf 18x=256\\\sf x=\dfrac{256\div2}{18\div2}\\\\\sf x=\dfrac{128}{9}\end{array}}$