QUESTION IMAGE
Question
11
?
type answer here.
12
Step1: Identificar ángulos suplementarios
Los ángulos formados en una línea recta suman $180^\circ$.
Step2: Calcular el ángulo desconocido
Restar el ángulo dado de $180^\circ$.
$\text{Ángulo desconocido} = 180^\circ - 57^\circ$
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$123^\circ$