From concept of base angle of parallel line, Option(D) Corresponding angles are congruent.
What is the concept to find the relation between ∠2 and ∠4 ?
Given that ∠1 ≅ ∠2 .
In the diagram given aside, line a and b are parallel where the ∠4 and ∠2 are base angle subtended by the parallel lines.
From the traversal property of congruency, we know that the base angles of a parallel lines always subtend equal and congruent angles when it is intercepted by a common traversal.
Thus, from concept of base angle of parallel line, Option(D) Corresponding angles are congruent.
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