Question

Urgente!! Exercício anexado

Answer 1

$tg\ \alpha=\frac{cateto\ oposto}{cateto\ adjacente}$

Resolução

$\tan \left(45^{\circ \:}\right)=\frac{x}{25}\\\\1=\frac{x}{25}\\\\\frac{x}{25}=1\\\\\frac{25x}{25}=1\cdot \:25\\\\\boxed{x=25}$

$25+1.8=\boxed{26.8\ m}$

Espero ter ajudado.