In the figure given below identify interior angles.
∠3, ∠4, ∠5, ∠6.
Interior angle can be defined as:
When two parallel lines are crossed by another line (which is called the transversal), the pairs of angles on opposite sides of the transversal but inside the two lines are called interior angles.
So in the given question, the interior angles are ∠3, ∠4, ∠5, ∠6.