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Question
angles abc and cbd are adjacent angles that together form angle abd. if * 1 point
angle abd measures 156° and angle cbd measures 67°, what is the
measure of angle abc?
156°
89°
67°
223°
two supplementary angles have measures in the ratio 7:2. what is the * 1 point
measure of the larger angle?
40°
20°
140°
160°
Problema 1:
Step1: Relación entre ángulos
Como \( \angle ABD=\angle ABC + \angle CBD\), entonces \( \angle ABC=\angle ABD-\angle CBD\).
Step2: Sustituir valores
Sustituyendo \( \angle ABD = 156^{\circ}\) y \( \angle CBD=67^{\circ}\), tenemos \( \angle ABC=156 - 67\).
Problema 2:
Step1: Definir variables
Sean los ángulos \( 7x\) y \( 2x\) (debido a la razón \(7:2\)). Como son suplementarios, \(7x + 2x=180^{\circ}\).
Step2: Resolver ecuación
Step3: Encontrar ángulo mayor
El ángulo mayor es \(7x\), sustituyendo \(x = 20^{\circ}\), \(7\times20^{\circ}=140^{\circ}\).
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- \(89^{\circ}\) (segundo opción del primer problema)
- \(140^{\circ}\) (tercer opción del segundo problema)