Question
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1. \( A \) y \( B \) son dos angulos suplementarios, con \( A=4(x-1)^{\circ} \) y \( B=7(x-2)^{\circ} \). Halla la me- dida del ángulo \( B \).

Ask by Vaughn Hall. in Mexico
Jan 22,2025

Real Tutor Solution

Tutor-Verified Answer

Answer

La medida del ángulo \( B \) es \( 112^{\circ} \).

Solution

Para resolver el problema, sigamos los pasos detalladamente: **Datos:** - \( A = 4(x - 1)^{\circ} \) - \( B = 7(x - 2)^{\circ} \) - \( A \) y \( B \) son ángulos suplementarios, por lo tanto: \[ A + B = 180^{\circ} \] **Paso 1: Plantear la ecuación** \[ 4(x - 1) + 7(x - 2) = 180 \] **Paso 2: Expandir los términos** \[ 4x - 4 + 7x - 14 = 180 \] **Paso 3: Combinar términos semejantes** \[ 11x - 18 = 180 \] **Paso 4: Aislar la variable \( x \)** \[ 11x = 180 + 18 \] \[ 11x = 198 \] \[ x = \frac{198}{11} \] \[ x = 18 \] **Paso 5: Hallar la medida del ángulo \( B \)** \[ B = 7(x - 2) = 7(18 - 2) = 7(16) = 112^{\circ} \] **Respuesta:** La medida del ángulo \( B \) es \( 112^{\circ} \).

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Para resolver este problema, sabemos que dos ángulos son suplementarios si su suma es igual a \(180^{\circ}\). Por lo tanto, podemos escribir la ecuación: \[ A + B = 180^{\circ} \] Sustituyendo las expresiones dadas: \[ 4(x-1) + 7(x-2) = 180 \] Ahora, expandimos y simplificamos la ecuación: \[ 4x - 4 + 7x - 14 = 180 \] \[ 11x - 18 = 180 \] \[ 11x = 198 \] \[ x = 18 \] Con \(x\) encontrado, ahora podemos calcular \(B\): \[ B = 7(x-2) = 7(18-2) = 7 \cdot 16 = 112^{\circ} \] Por lo tanto, la medida del ángulo \(B\) es \(112^{\circ}\).

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