Question

Quanto vale x no triângulo a seguir?

a) 5°
b) 30°
c) 40°
d) 60°​

Answer 1

$\large\boxed{\begin{array}{l} \underline{\sf{Observe\,a\,imagem\,em\,anexo.}} \\ \sf{A soma\, dos\, \hat{a}ngulos\, internos\,de\,um} \\ \sf{Tri\hat{a}ngulo\,\acute{e}\,180^\circ.}\end{array}}$

$\large\boxed{\begin{array}{l} \sf{x + 55^ \circ} + 95^ \circ = 180^ \circ \\ \sf{x + 150 {}^{ \circ} = 180^ \circ } \\ \sf{x = 180^ \circ - 150 ^\circ} \\ \sf{x = 30 {}^{ \circ} } \\\huge\boxed{ \boxed{ \boxed{ \boxed{ \sf \dagger \red{ \maltese}~ \blue{alternativa~B}}}}} \end{array}}$