Answer:
Step-by-step explanation:
12). From the picture attached,
Supplementary angle of the angle measuring 113° = 180° - 113° = 67°
Since, angles measuring 67° as shown in the figure are the alternate interior angles,
Therefore, by the converse of alternate interior angles theorem, lines j and k will be parallel.
13). Angles formed on the one side of the parallel lines and the transverse line are equal in measure (90°).
Therefore, by the converse of corresponding angles postulate, lines j and k will be parallel.
