Answer:
a. 30
Step-by-step explanation:
There’s a property that’s says that when 2 lines are parallel and an other is secant then if the alternate interior angle are the same . So I think that’s it I’m really sore if it’s total nonsense but I tried my best .
30
<1 is a vertical angle to the angle marked 30 degrees
We know that vertical angles are equal
Therefore
<1 = 30 degrees
