Answer:
∠4
Explanation:
What is an angle?
An angle is a measure of a turn, measured in degrees or °. Angles are made up of two rays, making the sides of the angle.
What is a congruent angle?
Congruent angles are the angles that have equal measure.
We may not know the exact measure of angle 2, but we an see that angle 4 is reflecting it, making it congruent (the same size).
Therefore, ∠4 is the correct answer.