Which reason justifies statement 5?

Reason given in explanation

Step-by-step explanation:

1. Given : Lines A and B are parallel, C and D are transversals .

2. We know that if two lines are parallel then alternate interior angles are equal.

As lines A and B are parallel, ( are alternate interior angles )

3.  We know that if two lines are parallel then alternate interior angles are equal.

As lines A and B are parallel, ( are alternate interior angles )

4. As lie on a straight line,

5. From point 2, 3, 4, we get

a

step-by-step explanation:

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if you was gonna solve for a, a is a   < -12