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c) Si el ángulo A y el ángulo \( B \) son opuestos por el vértice, y se tiene que \( \angle A=3 x+20 \) \( \angle B=4 x+5 \). Determina el valor de \( x \), así como el valor de ambos ángulos.

Ask by Tran Rogers. in Mexico
Mar 14,2025

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El valor de \( x \) es \( 15 \) y ambos ángulos \( A \) y \( B \) miden \( 65 \) grados.

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¡Hablemos de ángulos opuestos por el vértice! Se sabe que estos ángulos son iguales. Por lo tanto, podemos igualar las dos expresiones: \[ 3x + 20 = 4x + 5 \] Ahora, despejamos \( x \): \[ 20 - 5 = 4x - 3x \] \[ 15 = x \] Una vez que sabemos que \( x = 15 \), sustituimos este valor en las expresiones de los ángulos: \[ \angle A = 3(15) + 20 = 45 + 20 = 65^\circ \] \[ \angle B = 4(15) + 5 = 60 + 5 = 65^\circ \] Entonces, el valor de \( x \) es 15, y ambos ángulos miden \( 65^\circ \). ¡Matemáticas en acción!

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