Question

1)a soma de dos angulos internos de um triangulo e a)90 b)180 c)270 d)360 e)450

Answer 1

Resposta:  Alternativa b)

Explicação passo-a-passo:

Answer 2

$\large\boxed{\begin{array}{l} \rm{S_i = (n - 2) \cdot180 {}^{ \circ} } \\ \rm{S_i = (3 - 2) \cdot180 {}^{ \circ} } \\ \rm{S_i = 1 \cdot180 {}^{ \circ} } \\ \rm{S_i = 180 {}^{ \circ} } \\ \huge\boxed{ \boxed{ \boxed{ \boxed{ \rm \dagger \red{ \maltese}~ \blue{alternativa~B}}}}}\end{array}}$