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a triangle and one of its exterior angles are shown. what is the value …

Question

a triangle and one of its exterior angles are shown. what is the value of x? 38 52 128 142

Explanation:

Step1: Teorema de ángulo exterior

El ángulo exterior de un triángulo es igual a la suma de los dos ángulos internos no adyacentes.

Step2: Sustituir valores

En este caso, \(x = 38+90\) (ya que hay un ángulo recto de \(90^{\circ}\)).

$$x=38 + 90$$
$$x = 128$$

Answer:

C. 128