Answer:
∠3 is the alternate interior angle to ∠
Explanation:
When a line crosses two parallel lines, the angles formed the inside are referred to as interior angles. The alternative interior angles are a pair of angles on the inner side of the intersection on each of the lines but are opposite each other.
The angles of the same colour are a pair of alternate interior angles.
Now, looking at the figure given, we see that the alternate interior angle to ∠6 is ∠3.