Question

Determine a medida de AB neste caso:

Answer 1

$\boxed{\begin{array}{l}\sf BD=x\implies AB=x-4\\\sf\dfrac{x-4}{10}=\dfrac{10}{4}\\\sf 4x-16=100\\\sf 4x=100+16\\\sf 4x=116\\\sf x=\dfrac{116}{4}\\\\\sf x=29\\\sf AB=x-4\\\sf AB=29-4\\\sf AB=25\end{array}}$