Consider the following arrow diagram:  

Lines are parallel → alternate interior angles are equal.

1. Write this arrow diagram as a conditional (“If…, then…”) statement.

   Hint (a):

   If lines are parallel, then alternate interior angles are equal.

2. Write a similar conditional statement about corresponding angles, then write it as an arrow diagram.

   Hint (b):

   “If lines are parallel, then corresponding angles are equal” and “Lines are parallel $\rightarrow$ corresponding angles are equal.”