Question

ernos externos, un par de ángulos correspondientes, y un par de ángulos alternos internos. (a) ángulos alternos externos: (b) ángulos correspondientes: (c) ángulos alternos internos:

Explanation:

Step1: Recall exterior - alternate angles definition

Exterior - alternate angles are outside the two parallel lines and on opposite sides of the transversal. So, $\angle1$ and $\angle8$, $\angle5$ and $\angle4$ are exterior - alternate angles.

Step2: Recall corresponding angles definition

Corresponding angles are in the same relative position with respect to the parallel lines and the transversal. So, $\angle1$ and $\angle7$, $\angle2$ and $\angle8$, $\angle5$ and $\angle3$, $\angle6$ and $\angle4$ are corresponding angles.

Step3: Recall interior - alternate angles definition

Interior - alternate angles are between the two parallel lines and on opposite sides of the transversal. So, $\angle2$ and $\angle7$, $\angle6$ and $\angle3$ are interior - alternate angles.

Answer:

(a) $\angle1$ y $\angle8$, $\angle5$ y $\angle4$
(b) $\angle1$ y $\angle7$, $\angle2$ y $\angle8$, $\angle5$ y $\angle3$, $\angle6$ y $\angle4$
(c) $\angle2$ y $\angle7$, $\angle6$ y $\angle3$