QUESTION IMAGE
Question
in △qrs, $overline{sq}congoverline{rs}$ and m∠r = 48°. find m∠s.
Step1: Identificar triángulo isósceles
Dado que $\overline{SQ}\cong\overline{RS}$, $\triangle QRS$ es isósceles y $\angle Q=\angle R = 48^{\circ}$.
Step2: Usar la suma de ángulos en un triángulo
La suma de los ángulos internos de un triángulo es $180^{\circ}$. Entonces $m\angle Q + m\angle R+m\angle S=180^{\circ}$.
Sustituyendo $m\angle Q = 48^{\circ}$ y $m\angle R = 48^{\circ}$ en la ecuación:
$48^{\circ}+48^{\circ}+m\angle S = 180^{\circ}$.
Step3: Resolver para $m\angle S$
$m\angle S=180^{\circ}-(48^{\circ} + 48^{\circ})=180^{\circ}-96^{\circ}=84^{\circ}$.
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$84^{\circ}$