Isabelle proves that the triangles are congruent by using the parallel lines to determine a second set of angles are congruent. What statement and reason could she have used? ∠ABC ≅ ∠BAC; corresponding angles of parallel lines are congruent. ∠CAB ≅ ∠DCB; alternate interior angles of parallel lines are congruent ∠ABC ≅ ∠DCB; alternate interior angles of parallel lines are congruent ∠ACD ≅ ∠ABD; corresponding angles of parallel lines are congruent.

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Answer:

C

Step-by-step explanation:

The true statement is that proves the congruence of both triangles is:

  • ∠ABC ≅ ∠DCB; alternate interior angles of parallel lines are congruent

How to prove that angles are congruent

From the complete question, we have the following highlights

  • Angles B and C are alternate interior angles
  • The triangles are bounded by parallel lines

The above highlights mean that:

Angles ABC and DCB are congruent, by the theorem of alternate interior angles of parallel lines

Hence, the true statement is (c)

Read more about congruent triangles at:

https://brainly.com/question/1675117